CN210419092U

CN210419092U - Hand-operated lifting device

Info

Publication number: CN210419092U
Application number: CN201821656224.8U
Authority: CN
Inventors: 郝欣妮; 张恒; 卫玉芬; 朱亚东; 张兆东
Original assignee: Yangzhou Polytechnic College
Current assignee: Yangzhou Polytechnic College
Priority date: 2018-10-12
Filing date: 2018-10-12
Publication date: 2020-04-28
Anticipated expiration: 2028-10-12

Abstract

The utility model discloses a hand-operated lifting device in the technical field of lifting equipment, which comprises a base, a hydraulic cylinder and a plurality of lifting mechanisms, wherein the top of the uppermost lifting mechanism is connected with a horizontally arranged working platform, between adjacent lifting mechanisms, the top of the lower lifting mechanism is hinged with the bottom of the upper lifting mechanism, the bottom side of the base is fixedly connected with a connecting frame, the cylinder body of the hydraulic cylinder is hinged with the connecting frame, the hydraulic cylinder comprises a piston and a plunger, the piston is the power input end of the hydraulic cylinder, the connecting frame is rotatably connected with a rotating rod, one end of the rotating rod is rotatably connected with a driving rod, one end of the driving rod far away from the rotating rod is hinged with one end of the piston, one end of the piston is the end extending out of the cylinder body of the hydraulic cylinder, the other end of the rotating rod is connected, the piston can drive the plunger to extend out, and the end part of the plunger is connected with the lowest lifting mechanism; the utility model discloses simple structure, convenient operation.

Description

Hand-operated lifting device

Technical Field

The utility model belongs to the technical field of jacking equipment, in particular to hand formula elevating gear.

Background

The hydraulic lifting platform is widely applied to the current national economy as an aerial work platform, such as aerial work and maintenance of factories, automatic warehouses, parking lots, municipal facilities, wharfs, buildings, gardens, decoration, logistics, electric power, traffic, petroleum, chemical industry, hotels, gymnasiums, industrial mines, enterprises and the like.

Among the prior art, hydraulic lifting platform includes the base, pneumatic cylinder and a plurality of elevating system, the work platform that the level set up is connected with at the top of the elevating system of the top, in the direction of height, between the adjacent elevating system, the top of elevating system below is articulated with the bottom of the elevating system above, the end that stretches out of pneumatic cylinder is articulated with the drive end of below elevating system, the flexible motion of the end that stretches out of business turn over oil control pneumatic cylinder through control pneumatic cylinder, when needing to promote work platform, at least, need two people to realize, high labor strength, low efficiency.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model discloses a weak point among the above-mentioned prior art is overcome to aim at, solves the technical problem that intensity of labour is big among the prior art, provides a hand formula elevating gear, the utility model discloses simple structure only needs just can realize work platform's promotion alone, and it is more convenient to operate, and intensity of labour is little.

The purpose of the utility model is realized like this: a hand-operated lifting device comprises a base, a hydraulic cylinder and a plurality of lifting mechanisms, wherein the top of the uppermost lifting mechanism is connected with a working platform horizontally arranged, in the height direction, the top of the lower lifting mechanism is hinged with the bottom of the upper lifting mechanism, the bottom side of the base is fixedly connected with a connecting frame, the cylinder body of the hydraulic cylinder is hinged with the connecting frame, the hydraulic cylinder comprises a piston and a plunger, the piston is the power input end of the hydraulic cylinder, a rotating rod is rotatably connected onto the connecting frame, one end of the rotating rod is rotatably connected with a driving rod, one end of the driving rod, which is far away from the rotating rod, is hinged with one end of the piston, one end of the piston is the end extending out of the cylinder body of the hydraulic cylinder, the other end of the rotating rod is connected with a hand-operated rod extending out of the, the piston can drive the plunger to extend out, and the end part of the plunger is connected with the lowest lifting mechanism.

In the utility model, people stand on the working platform to load and unload corresponding goods; when the working platform needs to be lifted, a worker standing on the working platform slides out the telescopic rod from the hand-operated rod, when the telescopic rod extends to a position where the worker can reach the top of the telescopic rod when standing on the working platform, the action of the telescopic rod is stopped, the telescopic rod is manually operated to swing left, the telescopic rod drives the hand-operated rod to swing left, the swing of the hand-operated rod drives the anticlockwise rotation rod, the rotation rod drives the driving rod to swing left, the swing of the driving rod pushes the piston rod to continuously retract, under the pushing action of the piston rod, the plunger continuously inclines and extends upwards, and the plunger drives the lifting mechanism to ascend; after the lifting mechanism is lifted to a required height and the operation is finished, stopping manually cranking the telescopic rod, releasing pressure for the hydraulic cylinder, descending the working platform under the action of gravity, retracting the plunger under the action of external force of the working platform, workers and the like, continuously extending the piston outwards, gradually returning the hand rocker driven by the driving rod, stopping the pressure release of the hydraulic cylinder after the working platform returns, and finishing the work; the utility model has simple structure, can complete the lifting work of the working platform by only one person, has small labor intensity and realizes the convenient lifting of the working platform; can be applied to the work of lifting working platforms.

In order to further reduce the space of a hydraulic system, the hydraulic cylinder further comprises an outer cylinder body, an inner cylinder body is arranged in the outer cylinder body, the outer side of one end of the outer cylinder body is connected with one end of a piston sleeve, the piston is connected with the other end of the piston sleeve, a plunger sleeve is connected between the other end of the outer cylinder body and the outer side of one end of the inner cylinder body far away from the piston sleeve, a plunger capable of linearly reciprocating is hermetically connected in the inner cylinder body, a plunger support extending out of the inner cylinder body is arranged on the plunger sleeve, and the plunger is connected with the bottom of the lifting mechanism; an oil cavity is formed among the outer side of the inner cylinder body, the inner side of the outer cylinder body, one end of the piston sleeve and the plunger sleeve, a plunger cavity is formed among the inner side of the inner cylinder body, the piston sleeve and the plunger, and a piston cavity is formed between the inner side of the other end of the piston sleeve and the piston.

In order to further realize the extension and retraction of the plunger, a one-way valve I and a one-way valve II are arranged in the piston sleeve, an oil inlet of the one-way valve I is communicated with the oil cavity, and an oil outlet of the one-way valve I is communicated with the piston cavity; an oil inlet of the second one-way valve is communicated with the piston cavity, and an oil outlet of the second one-way valve is communicated with the plunger cavity; the piston sleeve is slidably connected with an unloading sleeve, one end of the unloading sleeve extending into the piston sleeve is connected with a connecting spring, the other end of the connecting spring is connected with the piston sleeve, a communicating hole is formed in the unloading sleeve, and when the unloading sleeve is pressed to move towards the piston sleeve, the oil cavity is communicated with an oil inlet of the check valve II through the communicating hole.

In order to realize the lifting of the working platform, the two lifting mechanisms are respectively a lower lifting mechanism and an upper lifting mechanism which have the same structure, the lower lifting mechanism comprises two lower outer hinge plates, the two lower outer hinge plates are symmetrically arranged relative to the center of the base in the front-back direction, the center of each lower outer hinge plate is hinged with a lower outer hinge plate, the lower inner hinge plate is hinged with the base, and the lower outer hinge plate is hinged with the base; the lifting mechanism comprises two upper outer hinge plates, the top ends of the lower inner hinge plates are hinged with the bottom ends of the upper outer hinge plates, the top ends of the lower outer hinge plates are hinged with the bottom ends of the upper inner hinge plates, the upper outer hinge plates are hinged with the bottom of the working platform, and the upper inner hinge plates are hinged with the working platform; and in the front-rear direction, a connecting rod is fixedly connected between the two lower inner hinge plates, and the end part of the plunger is hinged with the connecting rod.

In order to realize the reciprocating linear motion of telescopic link, the hand rocker place one end of keeping away from the base rotationally is connected with the turning block, and the turning block internal pressure that the hand rocker top corresponds is equipped with the transmission piece, transmission piece and telescopic link threaded connection.

As a further improvement of the utility model, the hand lever is provided with a limit step for limiting the position of the turning block.

In order to further accelerate the descending speed of the lifting mechanism, one end, far away from the hydraulic cylinder body, of the piston is connected with a connecting plate, one end of the connecting plate is hinged to the piston, the other end of the connecting plate is hinged to the driving rod, one end, opposite to the connecting plate, of the piston is connected with one end of a spring cover, the other end of the spring cover is connected with one end of a power-assisted spring, and the other end of the power-assisted spring is fixedly connected with the outer side of the other end of the piston sleeve.

For convenient removal the utility model discloses, the base is mobilizable.

In order to realize the utility model discloses a portable, four rotatable wheels that are the rectangle and arrange are arranged to the bottom of base.

In order to improve the stability of people when standing on the working platform, one side of the base is fixedly connected with the handrail in the left and right directions, and the top of the handrail is arranged above the working platform.

Drawings

FIG. 1 is a front view of the present invention

Fig. 2 is a first perspective view of the present invention.

Fig. 3 is a second perspective view of the present invention.

Fig. 4 is a front view of the hydraulic cylinder of the present invention.

Fig. 5 is a view from the direction B-B in fig. 4.

The hydraulic device comprises a rotating rod 1, a connecting frame 2, a connecting plate 3, a driving rod 4, a spring cover 5, a power-assisted spring 6, a hydraulic cylinder 7, a base 7, wheels 8, a hydraulic cylinder 9, a plunger 901, a plunger sleeve 902, an outer cylinder 903, a piston sleeve 904, an inner cylinder 905, an oil cavity 906, a communication hole 907, a unloading sleeve 908, a threaded oil plug 909, a connecting channel II, a piston 911, a piston cavity 912, a connecting channel I, a check valve I914, a plunger cavity 915, a check valve II 916, a connecting spring 917, a lower inner hinge plate 10, a lower outer hinge plate 11, an upper inner hinge plate 12, an upper outer hinge plate 13, a working platform 14, a rotating block 15, a handle 16, a telescopic rod 17, an 18 limiting step, a hand rocker 19, a supporting plate 20, a transmission block 21, a handrail 22 and a connecting rod 23.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1 to 5, the hand-operated lifting device comprises a base 7, a hydraulic cylinder 9 and a plurality of lifting mechanisms, wherein the base 7 is movable, four rotatable wheels 8 which are arranged in a rectangular shape are arranged at the bottom of the base 7, the top of the uppermost lifting mechanism is connected with a horizontally arranged working platform 14, the right side of the base 7 is fixedly connected with a handrail 22, and the top of the handrail 22 is arranged above the working platform 14; in the height direction, between adjacent lifting mechanisms, the top of the lower lifting mechanism is hinged with the bottom of the upper lifting mechanism, the bottom side of the base 7 is fixedly connected with a connecting frame 2, a cylinder body of the hydraulic cylinder 9 is hinged with the connecting frame 2, the hydraulic cylinder 9 comprises a piston 911 and a plunger 901, the piston 911 is a power input end of the hydraulic cylinder 9, the connecting frame 2 is rotatably connected with a rotating rod 1, one end of the rotating rod 1 is rotatably connected with a driving rod 4, one end of the driving rod 4, far away from the rotating rod 1, is hinged with one end of the piston 911, one end of the piston 911 is an end extending out of the cylinder body of the hydraulic cylinder 9, the other end of the rotating rod 1 is connected with a hand-operated rod 19 extending out of the base 7, an expansion rod 17 is slidably connected in the hand-operated rod 19, one end of the hand-operated rod 19, far, the transmission block 21 is in threaded connection with the telescopic rod 17, the handle 16 is arranged on the top side of the telescopic rod 17, in order to improve the reliability of rotation of the rotating rod 1, the supporting plate 20 is arranged on the outer side of the base 7, the rotating rod 1 is rotatably connected to the supporting plate 20, the limiting step 18 for limiting the position of the rotating block 15 is arranged on the hand-operated rod 19, the piston 911 can drive the plunger 901 to extend out, and the end part of the plunger 901 is connected with the lowest lifting mechanism.

In order to further reduce the space of a hydraulic system, the hydraulic cylinder 9 further comprises an outer cylinder body 903, an inner cylinder body 905 is arranged in the outer cylinder body 903, the outer side of one end of the outer cylinder body 903 is connected with one end of a piston 911 sleeve 904, a piston 911 is connected with the other end of the piston 911 sleeve 904, a plunger sleeve 902 is connected between the other end of the outer cylinder body 903 and the outer side of one end of the inner cylinder body 905 far away from the piston 911 sleeve 904, a plunger 901 capable of linearly reciprocating is hermetically connected in the inner cylinder body 905, the plunger 901 extending out of the inner cylinder body 905 is supported and arranged on the plunger sleeve 902, and the plunger 901 is connected with the bottom of; an oil chamber 906 is formed between the outer side of the inner cylinder 905, the inner side of the outer cylinder 903, one end of the piston 911 sleeve 904 and the plunger sleeve 902, a plunger chamber 915 is formed between the inner side of the inner cylinder 905, the piston 911 sleeve 904 and the plunger 901, and a piston chamber 912 is formed between the inner side of the other end of the piston 911 sleeve 904 and the piston 911.

In order to further realize the extension and retraction of the plunger 901, a first check valve 914 and a second check valve 916 are arranged in the sleeve 904 of the piston 911, an oil inlet of the first check valve 914 is communicated with the oil cavity 906, and an oil outlet of the first check valve 914 is communicated with the piston cavity 912; an oil inlet of the second check valve 916 is communicated with the piston cavity 912, and an oil outlet of the second check valve 916 is communicated with the plunger cavity 915; an unloading sleeve 908 is slidably connected to the piston 911 sleeve 904, one end of the unloading sleeve 908, which extends into the piston 911 sleeve 904, is connected with a connecting spring 917, the other end of the connecting spring 917 is connected with the piston 911 sleeve 904, a communication hole 907 is formed in the unloading sleeve 908, and when the unloading sleeve 908 is pressed to move towards the piston 911 sleeve 904, the oil chamber 906 is communicated with an oil inlet of the check valve II 916 through the communication hole 907; when the unloading sleeve 908 is not pressed, the oil cavity is not communicated with the oil inlet of the check valve II 916; a first connecting channel 913 between an oil outlet of the first check valve 914 and the piston cavity 912 is sealed in the piston 911 sleeve through an upper threaded oil plug, and a second connecting channel 910 between an oil inlet of the second check valve 916 and the communication hole is sealed in the piston 911 sleeve through a lower threaded oil plug 909.

In order to realize the lifting of the working platform 14, two lifting mechanisms are arranged, namely a lower lifting mechanism and an upper lifting mechanism which are the same in structure, the lower lifting mechanism comprises two lower outer hinged plates 11, the two lower outer hinged plates 11 are symmetrically arranged relative to the base 7 in the front-back direction, the centers of the lower outer hinged plates 11 are hinged with the lower outer hinged plates 11, the lower inner hinged plate 10 is hinged with the base 7, and the lower outer hinged plates 11 are hinged with the base 7; the lifting mechanism comprises two upper outer hinge plates 13, the top end of a lower inner hinge plate 10 is hinged with the bottom ends of the upper outer hinge plates 13, the top end of a lower outer hinge plate 11 is hinged with the bottom end of an upper inner hinge plate 12, an upper outer hinge plate 1 is hinged with the bottom of a working platform 14, and an upper inner hinge plate 101 is hinged with the working platform 14; in the front-rear direction, a connecting rod 23 is fixedly connected between the two lower inner hinge plates 10, and the end of the plunger 901 is hinged with the connecting rod 23.

In order to further accelerate the descending speed of the lifting mechanism, one end, away from the piston 911 of the hydraulic cylinder 9, of the cylinder body is connected with a connecting plate 3, one end of the connecting plate 3 is hinged to the piston 911, the other end of the connecting plate 3 is hinged to a driving rod 4, one end, opposite to the piston 911 arranged on the connecting plate 3, of the piston 911 is connected with one end of a spring 917 cover 5, the other end of the spring cover 5 is connected with one end of a power-assisted spring 6, and the other end of the power-assisted spring 6 is fixedly connected with.

In the utility model, a person stands on the working platform 14 to load and unload corresponding goods; when the working platform 14 needs to be lifted, a worker standing on the working platform squats half to rotate the rotating block 15, a bearing is pressed in the rotating block 15, the rotating block is rotatably connected with the hand-operated rod 19 through the bearing, the rotating block 15 drives the bearing to rotate around the central axis of the hand-operated rod 19, the rotating block 15 drives the transmission block 21 to rotate, the transmission block 21 drives the telescopic rod 17 to move, the rotating direction of the rotating block 15 is controlled to enable the telescopic rod 17 to move upwards, when the telescopic rod 17 moves upwards to a position where the worker can reach when standing to work, the rotating block 15 stops rotating, the hand handle 16 enables the telescopic rod 17 to swing leftwards, the telescopic rod 17 drives the hand-operated rod 19 to swing leftwards, the swing of the hand-operated rod 19 drives the rotating rod 1 to rotate anticlockwise, the rotating rod 1 drives the driving rod 4 to swing leftwards, the swing of the driving rod 4 pushes the piston 911 rod to continuously, after the oil pressure in the piston cavity 912 is greater than the oil pressure in the plunger cavity 915, the second check valve 916 is opened, oil with pressure enters the plunger cavity 915 from the piston cavity 912212, the plunger 901 is pushed to continuously extend under the action of the pressure, the plunger 901 continuously extends to push the lower inner hinge plate 10 to rotate upwards around the center of the connection between the lower inner hinge plate 10 and the base 7, the upper outer hinge plate 13 rotates upwards under the action of the lower inner hinge plate 10, and according to the same principle, the upper outer hinge plate 13 and the upper inner hinge plate 12 simultaneously rotate upwards, and the upper outer hinge plate 13 and the upper inner hinge plate 12 drive the working platform 14 to ascend; the telescopic rod 17 is continuously shaken to continuously swing leftwards, the lifting mechanism continuously rises, when the working platform 14 rises to a required height and finishes the operation, under the pushing action of the piston 911 rod, the plunger 901 continuously inclines and extends upwards, and the plunger 901 drives the lifting mechanism to rise; after the lifting mechanism is lifted to a required height and the operation is finished, the hand-operated telescopic rod 17 is stopped, the hydraulic cylinder 9 is depressurized, specifically, the unloading sleeve 908 is pressed down, the unloading sleeve 908 moves into the piston 911 sleeve 904, when the communication hole 907 is communicated with the plunger cavity 915 and the oil inlet of the check valve 916, oil in the plunger cavity 915 sequentially enters the oil cavity 906 through the oil inlet of the check valve 916 and the communication hole 907, so that the depressurization of the plunger cavity 915 is realized, the working platform 14 descends under the action of gravity, the plunger 901 continuously retracts, the piston 911 quickly returns under the action of the power spring 6, the piston 911 pushes the driving rod 4 to quickly return, the working platform 14 descends under the action of gravity, the plunger 901 retracts under the action of external forces of the working platform 14 and working personnel, the piston extends outwards continuously, the driving rod 4 drives the hand-operated rod 19 to gradually return, and after the working platform 14 descends to the required height, stopping the pressure relief of the hydraulic cylinder 9 and finishing the work; the utility model has simple structure, can complete the lifting work of the working platform 14 on the working platform 14, has simple operation and small labor intensity; can be applied to the work of lifting the working platform 14.

The present invention is not limited to the above embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some replacements and transformations for some technical features without creative labor according to the disclosed technical contents, and these replacements and transformations are all within the protection scope of the present invention.

Claims

1. A hand-operated lifting device comprises a base, a hydraulic cylinder and a plurality of lifting mechanisms, wherein the top of the uppermost lifting mechanism is connected with a working platform horizontally arranged, in the height direction, the top of the lower lifting mechanism is hinged with the bottom of the upper lifting mechanism, the hand-operated lifting device is characterized in that the bottom side of the base is fixedly connected with a connecting frame, the cylinder body of the hydraulic cylinder is hinged with the connecting frame, the hydraulic cylinder comprises a piston and a plunger, the piston is the power input end of the hydraulic cylinder, a rotating rod is rotatably connected onto the connecting frame, one end of the rotating rod is rotatably connected with a driving rod, one end of the driving rod, which is far away from the rotating rod, is hinged with one end of the piston, one end of the piston is the end, which is located outside the cylinder body of the hydraulic cylinder, the other end of the rotating rod is connected with a, the piston can drive the plunger to extend out, and the end part of the plunger is connected with the lowest lifting mechanism.

2. The hand-operated lifting device according to claim 1, wherein the hydraulic cylinder further comprises an outer cylinder body, an inner cylinder body is arranged in the outer cylinder body, the outer side of one end of the outer cylinder body is connected with one end of a piston sleeve, the piston is connected with the other end of the piston sleeve, a plunger sleeve is connected between the other end of the outer cylinder body and the outer side of one end of the inner cylinder body far away from the piston sleeve, a plunger capable of linearly reciprocating is hermetically connected in the inner cylinder body, a plunger support extending out of the inner cylinder body is arranged on the plunger sleeve, and the plunger is connected with the bottom of the lifting mechanism; an oil cavity is formed among the outer side of the inner cylinder body, the inner side of the outer cylinder body, one end of the piston sleeve and the plunger sleeve, a plunger cavity is formed among the inner side of the inner cylinder body, the piston sleeve and the plunger, and a piston cavity is formed between the inner side of the other end of the piston sleeve and the piston.

3. The hand-operated lifting device according to claim 2, wherein a first check valve and a second check valve are arranged in the piston sleeve, an oil inlet of the first check valve is communicated with the oil cavity, and an oil outlet of the first check valve is communicated with the piston cavity; an oil inlet of the second one-way valve is communicated with the piston cavity, and an oil outlet of the second one-way valve is communicated with the plunger cavity; the piston sleeve is slidably connected with an unloading sleeve, one end of the unloading sleeve extending into the piston sleeve is connected with a connecting spring, the other end of the connecting spring is connected with the piston sleeve, a communicating hole is formed in the unloading sleeve, and when the unloading sleeve is pressed to move towards the piston sleeve, the oil cavity is communicated with an oil inlet of the check valve II through the communicating hole.

4. The hand-operated lifting device according to claim 2 or 3, wherein the lifting mechanism comprises two lower lifting mechanisms and two upper lifting mechanisms which are respectively of the same structure, the lower lifting mechanism comprises two lower outer hinged plates, the two lower outer hinged plates are symmetrically arranged relative to the center of the base in the front-back direction, the center of each lower outer hinged plate is hinged with the corresponding lower outer hinged plate, the lower inner hinged plate is hinged with the base, and the lower outer hinged plate is hinged with the base; the lifting mechanism comprises two upper outer hinge plates, the top ends of the lower inner hinge plates are hinged with the bottom ends of the upper outer hinge plates, the top ends of the lower outer hinge plates are hinged with the bottom ends of the upper inner hinge plates, the upper outer hinge plates are hinged with the bottom of the working platform, and the upper inner hinge plates are hinged with the working platform; and in the front-rear direction, a connecting rod is fixedly connected between the two lower inner hinge plates, and the end part of the plunger is hinged with the connecting rod.

5. The hand-operated lifting device according to claim 1, wherein one end of the hand lever far away from the base is rotatably connected with a rotating block, a transmission block is pressed in the rotating block corresponding to the upper part of the hand lever, and the transmission block is in threaded connection with the telescopic rod.

6. A hand-operated lifting device according to claim 5, characterized in that the hand-operated lever is provided with a limiting step for limiting the position of the turning block.

7. The hand-operated lifting device according to claim 1, wherein one end of the piston far away from the hydraulic cylinder body is connected with a connecting plate, one end of the connecting plate is hinged to the piston, the other end of the connecting plate is hinged to the driving rod, one end of the piston opposite to the connecting plate is connected with one end of a spring cover, the other end of the spring cover is connected with one end of the power-assisted spring, and the other end of the power-assisted spring is fixedly connected with the outer side of the other end of the piston sleeve.

8. A hand-operated lifting device according to claim 4, characterised in that the base is movable.

9. A hand-operated lifting device as claimed in claim 7, wherein four rotatable wheels are arranged at the bottom of the base in a rectangular arrangement.

10. A hand-operated lifting device according to any one of claims 1 to 3 or 5 to 9, wherein a handrail is fixedly connected to one side of the base in the left-right direction, and the top of the handrail is positioned above the working platform.