CN214456514U

CN214456514U - Portable shearing type lifter

Info

Publication number: CN214456514U
Application number: CN202022716196.8U
Authority: CN
Inventors: 郭晓亮; 邓向斌; 丁文兵
Original assignee: Hangzhou Lebben Technology Co ltd
Current assignee: Hangzhou Lebben Technology Co ltd
Priority date: 2019-12-17
Filing date: 2020-11-20
Publication date: 2021-10-22
Anticipated expiration: 2030-11-20

Abstract

The application discloses portable formula of cutting machine of lifting includes: the base is provided with a roller set which can stretch out and draw back in the height direction, the roller set has a loading state and a releasing state, and the base is abutted against the ground when the roller set is in the loading state; the lifting platform is used for bearing a load; the scissor mechanism is abutted between the base and the lifting platform, and the base and the lifting platform are close to each other when the scissor mechanism is in a folded state; and the driving hydraulic cylinder is used for driving the scissor mechanism to switch the folding state and the unfolding state. According to the technical scheme disclosed by the application, the stroke of the driving hydraulic cylinder is fully released into a lifting stroke through the arrangement of the scissor mechanism; and the use requirements of the lifter under two different working conditions of moving and lifting are realized through the telescopic roller group.

Description

Portable shearing type lifter

Technical Field

The application relates to the field of mechanical equipment, in particular to a portable shearing type lifting machine.

Background

The domestic lifting machine gradually becomes popular from the 90 s in the 20 th century, and with the increase of the automobile keeping quantity in China, the lifting machine is used as an important tool for automobile maintenance, and the demand is greatly increased. The market of the lifting machine at present has nearly hundreds of foreign brands, and the product series is hundreds of thousands. The traditional lifting machine is mainly a double-column type lifting machine, a four-column type lifting machine, a scissor-fork type lifting machine and the like. The portable mobile robot has the advantages of being large in size, large in occupied space, inconvenient to move and incapable of meeting requirements of mobile maintenance, door-to-door service, road rescue and the like.

In recent years, a new movable scissor-fork type lifter and a portable parallelogram lifter are sold in the market, and related technologies disclose a portable quick lifter, which comprises a base, a bracket and a front group of support rods and a rear group of support rods, wherein the base, the bracket and the front group of support rods and the rear group of support rods form a parallelogram mechanism; the telescopic cylinder comprises a cylinder body, a piston rod and a return spring, and an oil inlet is formed in the rear end of the cylinder body; the lower end of the telescopic cylinder is rotatably connected with the base, and the upper end of the telescopic cylinder is rotatably connected with the bracket and used for driving the bracket to lift relative to the base; the upper end of the telescopic cylinder is positioned on the front side of the lower end; the bottom of the bracket is provided with a universal wheel and a directional wheel; the lifter also comprises a locking mechanism.

The inventor has found that the lifting machine disclosed in the related art and the like have a problem of limited lifting height, and do not satisfy the requirement of portability in the folded state. In the use scene that needs often carry the machine of lifting, it is comparatively inconvenient.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the application discloses portable formula of cutting machine of lifting includes:

the base is provided with a roller set which can stretch out and draw back in the height direction, the roller set has a loading state and a releasing state, and the base is abutted against the ground when the roller set is in the loading state;

the lifting platform is used for bearing a load;

the scissor mechanism is abutted between the base and the lifting platform, and the base and the lifting platform are close to each other when the scissor mechanism is in a folded state;

and the driving hydraulic cylinder is used for driving the scissor mechanism to switch the folding state and the unfolding state.

Several alternatives are provided below, but not as an additional limitation to the above general solution, but merely as a further addition or preference, each alternative being combinable individually for the above general solution or among several alternatives without technical or logical contradictions.

Optionally, the scissors mechanism includes two X-shaped support frames arranged side by side in the width direction, and the middle parts of the support frames are hinged through the same rotating pivot;

the driving hydraulic cylinder is arranged between the two support frames, and two ends of the driving hydraulic cylinder are respectively hinged with the base and the lifting platform.

Optionally, a support extension part arranged in a sliding manner along the length direction is arranged on the lifting platform; the base is provided with a bottom extension part which is arranged in a sliding manner along the length direction.

Optionally, each of the support frames and the lifting platform has two connection points arranged along the length direction, wherein the connection point near the support extension part is hinged, and the other connection point is in sliding connection;

each support frame and the base are provided with two connecting points which are arranged along the length direction, wherein the connecting point close to the bottom extending part is hinged, and the other connecting point is in sliding connection.

Optionally, a first slideway extending in the length direction is arranged in the lifting platform, and the support extending part is slidably mounted in the first slideway;

the side edge of the lifting platform is also provided with a second slide way extending along the length direction, the second slide way is open towards the width direction, and a first roller matched with the second slide way is arranged at the corresponding position of the support frame;

the side edge of the base is also provided with a third slide way extending along the length direction, in the width direction, the third slide way is opened towards the second slide way, and a second roller matched with the third slide way is arranged at the corresponding position of the support frame;

in the width direction, the base, the second roller, the support frame, the first roller and the lifting platform are sequentially arranged from outside to inside.

Optionally, the base is rectangular and forms a first rectangular frame; the lifting platform is rectangular and forms a second rectangular frame; in the projection in the height direction, the second rectangular frame is positioned in the first rectangular frame.

Optionally, in the width direction, the support frame is located in a gap between the first rectangular frame and the second rectangular frame.

Optionally, portable formula of cutting machine of lifting still includes and is used for the restriction cut fork mechanism spatial state's auto-lock structure, auto-lock mechanism includes:

the locking groove is arranged on the base and is provided with a plurality of locking blocks;

and one end of the locking rod is hinged on the scissors mechanism, and the other end of the locking rod is a lock tongue and extends into the lock groove to be matched with the locking block.

Optionally, the self-locking mechanism further comprises a lock releasing block, the lock releasing block is hinged to the lock tongue and has an open state for opening the lock tongue and a working state for shielding the lock tongue, and in the working state, the lock tongue and the lock block are separated by the lock releasing block;

when the scissor fork mechanism enters the unfolding state from the folding state, the locking rod moves along with the scissor fork mechanism, and the lock tongue sequentially passes through the guide surface and the locking surface of each locking block; the lock releasing block is in a working state, and in the process that the scissors mechanism enters a folding state from the unfolding state, the lock releasing block guides the lock tongue to sequentially pass through the locking surface and the guide surface of each locking block.

Optionally, the roller group includes at least three rollers, and between each roller and the base, there is:

a fixing base connected with the base

The wheel seat is connected with the wheel shaft of the roller and can slide relative to the fixed seat along the height direction;

and the pressure spring is abutted between the wheel seat and the fixed seat.

According to the technical scheme disclosed by the application, the stroke of the driving hydraulic cylinder is fully released into a lifting stroke through the arrangement of the scissor mechanism; and the use requirements of the lifter under two different working conditions of moving and lifting are realized through the telescopic roller group.

Specific advantageous technical effects will be further explained in conjunction with specific structures or steps in the detailed description.

Drawings

FIG. 1 is a schematic view of an embodiment of a portable scissor lift;

FIG. 2 is a schematic view of the portable scissor lift of FIG. 1 in a different state;

FIG. 3 is an enlarged cross-sectional schematic view of the locking groove of FIG. 2;

FIG. 4 is a schematic view of the base of FIG. 1;

FIG. 5 is a schematic view of the scissors mechanism of FIG. 1;

fig. 6 is a schematic view of the roller set in fig. 1.

The reference numerals in the figures are illustrated as follows:

1. a base; 11. a bottom extension; 12. a third slideway;

2. a lifting platform; 21. supporting the extension; 22. a second slideway;

3. a scissor mechanism; 31. a support frame; 32. a rotating pivot; 33. a first roller; 34. a second roller;

4. driving the hydraulic cylinder;

5. a roller set; 51. a roller; 52. a fixed seat; 53. a wheel seat; 54. a pressure spring;

6. a self-locking mechanism; 61. locking the groove; 611. a locking block; 612. a locking surface; 613. a guide surface; 62. a locking lever; 621. a latch bolt; 63. and releasing the locking block.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.

Unless defined otherwise, 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. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-6, the present application discloses a portable scissor lift comprising:

the base 1 is provided with a roller group 5 which can stretch out and draw back in the height direction, the roller group 5 has a loading state and a releasing state, and the base 1 is propped against the ground when the roller group 5 is in the loading state;

a lifting platform 2 for supporting a load (not shown);

the scissor mechanism 3 is abutted between the base 1 and the lifting platform 2, and the base 1 and the lifting platform 2 are close to each other when the scissor mechanism 3 is in a folded state;

and the hydraulic cylinder 4 is driven and used for driving the scissor mechanism 3 to switch the folding state and the unfolding state.

The height direction herein refers to the direction of gravity, i.e., the lifting direction of the lifter; the lift also includes opposite lengthwise and widthwise directions. The scissor mechanism 3 can move in the other direction besides the height direction, namely the length direction, and in order to meet the movement stroke of the scissor mechanism 3, the lifter has the minimum length in the length direction; meanwhile, the self weight is controlled in order to facilitate storage and transportation, and the horizontal direction can be correspondingly reduced in the other direction, namely the width direction.

The movement of the drive cylinder 4 drives a change in the distance between the table 2 and the base 1. Under the constraint of the scissor mechanism 3, the lifting platform 2 can be stably lifted and lowered, namely, the scissor mechanism 3 can fully release the stroke of the driving hydraulic cylinder 4 into a lifting stroke. Before the load acts on the lifting platform 2, the scissor fork mechanism 3 is in a folded state, the whole lifter is box-shaped, and the lifter can be moved to a designated position in a dragging mode. In the process, the roller wheel group 5 is used for releasing the relative displacement of the lifter and the ground. When lifting is needed, the driving hydraulic cylinder 4 needs to be connected to an external power source, and can be a hydraulic pump station and the like. In the process of driving the hydraulic cylinder 4 to move, the lifting platform 2 is abutted against a load (namely a vehicle). Under the action of the loaded gravity, the roller set 5 enters a loaded state, and the bottom surface is propped against the bottom surface. The design can effectively protect the roller group 5, and the roller group 5 only needs to bear quantitative pressure, so that the roller group 5 is prevented from being damaged due to heavy load; more importantly, in the lifting process, the base 1 is directly abutted against the bottom surface, so that the possibility of displacement of the lifter is avoided, and the safety performance is improved.

In the specific arrangement of the supporting frame 31, in an embodiment, the scissors mechanism 3 includes two X-shaped supporting frames 31 arranged side by side in the width direction, and the middle parts of the supporting frames 31 are hinged by the same rotating pivot 32;

the driving hydraulic cylinder 4 is positioned between the two support frames 31, and two ends of the driving hydraulic cylinder 4 are respectively hinged with the base 1 and the lifting platform 2.

The lift is not only subjected to the weight of the load in the height direction during the lifting process, but also has sufficient stability to avoid overturning. Therefore, the elevating platform 2 and the base 1 improve the anti-overturning capability by increasing the sectional area of themselves in the height direction. The scissors mechanism 3 solves this problem by increasing its own equivalent thickness in the width direction. In order to control the weight, the support frames 31 arranged side by side can effectively increase the equivalent thickness of the scissor fork mechanism 3 in the width direction, and improve the torsion resistance and the overturn resistance of the lifter. Simultaneously, the driving hydraulic cylinder 4 is arranged between the two support frames 31, and the support frames 31 can provide protection for the driving hydraulic cylinder 4, so that the influence of external foreign matters on main parts is avoided.

In terms of the stability of the lifting machine, in one embodiment, the lifting table 2 is provided with a support extension part 21 which is arranged in a sliding manner along the length direction; the base 1 is provided with a bottom extension 11 slidably provided in the longitudinal direction. The base extension 11 and support extension 21 operate on the same principle. Stability is improved by increasing the contact area. The advantage of the base extension 11 and support extension 21 is that they can be adjusted to suit different operating conditions of the lift. When the lift needs to be stored and transported, the bottom extension 11 and the support extension 21 can be retracted into the interior of the lift, thereby reducing the volume; when the lifting machine is working, the bottom extension 11 and the support extension 21 can be extended relative to the lifting machine to meet the use requirements.

The arrangement of the bottom extension 11, the support extension 21, and the support bracket 31 is required to have a mating relationship. In one embodiment, each support frame 31 and the platform 2 have two attachment points arranged along the length direction, wherein the attachment point near the support extension 21 is hinged and the other attachment point is a sliding connection;

each support frame 31 and base 1 has two attachment points arranged along its length, one near the bottom extension 11 being hinged and the other being a sliding connection.

During the movement of the scissors mechanism 3, the length change in one dimension is released by the length change in the other dimension. Particularly, in the lifting machine of the embodiment, when the lifting machine enters the unfolding process from the folded state, the length of the supporting frame 31 in the length direction is shortened, and meanwhile, the length of the supporting frame 31 in the height direction is increased to realize the lifting work of the lifting machine. However, the shorter length of the support frame 31 in the longitudinal direction may cause the reduction of the mechanical properties of both ends of the lifting platform 2, especially when the support extension 21 is provided at one end. In order to reduce the weight of the extension member as much as possible while ensuring the strength and to save materials, the present embodiment ensures the strength of the extension member by disposing the hinged connection point near the end where the extension member is located.

In the specific installation of the extension part, in an embodiment, a first slide way extending along the length direction is arranged in the lifting platform 2, and the support extension part 21 is slidably installed in the first slide way (not numbered);

the side edge of the lifting platform 2 is also provided with a second slideway 22 extending along the length direction, the second slideway 22 is opened towards the width direction, and the corresponding position of the supporting frame 31 is provided with a first roller 33 matched with the second slideway 22;

the side edge of the base 1 is also provided with a third slideway 12 extending along the length direction, in the width direction, the third slideway 12 is opened towards the second slideway 22, and the corresponding position of the supporting frame 31 is provided with a second roller 34 matched with the third slideway 12;

in the width direction, the parts are, from the outside to the inside, a base 1, a second roller 34, a support frame 31, a first roller 33 and a lifting platform 2.

Each sliding relation's setting can avoid each part interference each other on the direction of height to can realize smooth folding when the machine of lifting is located fold condition, this design is very important to portable design demand. The utility model provides a machine of lifting can be convenient under fold condition realize piling up and warehousing and transportation.

In terms of the geometrical relationship of the various parts, in one embodiment, the base 1 is rectangular and constitutes itself a first rectangular frame (not numbered); the lifting platform 2 is rectangular and forms a second rectangular frame (not numbered) by itself; in the projection in the height direction, the second rectangular frame is positioned in the first rectangular frame.

The second rectangular frame is positioned in the first rectangular frame, so that the lifting platform 2 is accommodated in the base 1 when the lifting machine is in a folded state. In order to improve the stability of the lifting platform 2 to the load, the lifting platform 2 may be provided with an extension portion on the plane where the lifting platform 2 is located, in the projection relationship discussed in the present embodiment, the extension portion is not in the discussion range, the first rectangular frame is formed by the main body stress frame of the base 1, and the second rectangular frame is formed by the main body stress frame of the lifting platform 2.

In the positional relationship of the support frame 31, the base 1, and the lift table 2, in one embodiment, the support frame 31 is located in the gap between the first rectangular frame and the second rectangular frame in the width direction.

The support frame 31 is located in the gap to fully utilize the space in the structure, thereby improving the space performance of the lifting machine in the folded state. Accordingly, the two support frames 31 are correspondingly arranged in the two gaps, that is, the gaps of the first rectangular frame and the second rectangular frame are at least two in the width direction.

In an embodiment, the portable scissor lift further comprises a self-locking mechanism for limiting the spatial state of the scissor mechanism 3, and the self-locking mechanism 6 comprises:

a locking groove 61 installed on the base 1 and provided with a plurality of locking blocks 611;

one end of the locking lever 62 is hinged to the scissors mechanism 3, and the other end is a latch 621 and extends into the lock slot 61 to cooperate with the locking block 611.

The self-locking mechanism 6 is used for keeping the space state of the scissor mechanism 3 and preventing lifting failure or falling caused by accidents in the operation process. The locking lever 62 moves with the scissors mechanism 3 and the latch 621 is able to engage with the locking block 611 by itself to improve safety.

In order to facilitate the user to lower the lifting machine and avoid the need to manually hold the position of the locking lever 62, in an embodiment, the self-locking mechanism 6 further includes a release block 63, the release block 63 is hinged on the latch 621 and has an open state for opening the latch 621 and an operating state for shielding the latch 621, and in the operating state of the release block 63, the latch 621 is separated from the locking block 611 by the release block 63;

when the scissors mechanism 3 enters the unfolding state from the folding state, the locking rod 62 moves along with the scissors mechanism 3, and the bolt 621 sequentially passes through the guide surface 613 and the locking surface 612 of each locking block 611; when the lock releasing block 63 is in the operating state and the scissors mechanism 3 enters the folded state from the unfolded state, the lock releasing block 63 guides the lock tongue 621 to pass through the locking surface 612 and the guide surface 613 of each locking block 611 in sequence.

The side of the locking block 611 opposite to the latch 621 is a guide surface 613 capable of guiding the latch 621 to turn over the locking block 611; one surface of locking block 611 facing lock tongue 621 is a locking surface 612, and can abut against lock tongue 621 to restrict movement of locking lever 62, thereby achieving locking of the spatial state of the lifting machine.

In the arrangement of the roller set 5, in an embodiment, the roller set 5 includes at least three rollers 51, and between each roller 51 and the base 1:

a fixed seat 52 connected with the base 1

A wheel seat 53 connected to a wheel shaft of the roller 51 and capable of sliding relative to the fixed seat 52 in a height direction;

and a compression spring 54 abutting between the wheel seat 53 and the fixed seat 52.

At least three roller sets 5 are required to determine the stability of the base 1. In principle, the distance from the bottom surface of the roller 51 to the bottom surface is a load stroke, and the elastic force of the driving compression spring 54 for compressing the load stroke is a preset pressure of the roller 51, which needs to be less than the design stress of the roller 51, so as to protect the roller 51.

In the specific use process:

when an operator needs to use the lifting machine, the lifting machine can be moved to a required position with the help of the roller 51, and the lifting action of the lifting machine is realized by driving the hydraulic cylinder 4; in the lifting process of the lifter, the locking rod 62 moves along with the scissors mechanism 3, and the bolt 621 passes through the guide surface 613 and the locking surface 612 of each locking block 611 in sequence; until reaching the preset height, the operator adjusts the driving hydraulic cylinder 4 to make the lifter descend slightly so as to realize the engagement of the locking block 611 and the bolt 621, thus ensuring the use safety.

In the case of use of some long wheelbase models, the operator can improve stability by supporting the extension 21 and the bottom extension 11;

when an operator needs to lower the lifting machine, the hydraulic cylinder 4 is driven to realize small lifting of the lifting machine so as to realize separation of the locking blocks 611 and the lock tongues 621, the unlocking block 63 is shifted to enter a working state at the moment, the hydraulic cylinder 4 is adjusted and driven to enable the lifting machine to descend, and the unlocking block 63 guides the lock tongues 621 to sequentially pass through the locking surfaces 612 and the guide surfaces 613 of the locking blocks 611, so that the lifting machine is convenient and fast.

In some use scenarios, multiple lifting machines mentioned in the application can be used simultaneously, so as to facilitate operation.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features. When technical features in different embodiments are represented in the same drawing, it can be seen that the drawing also discloses a combination of the embodiments concerned.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application.

Claims

1. Portable formula of cutting machine of lifting, its characterized in that includes:

the lifting platform is used for bearing a load;

2. A portable scissor lift according to claim 1, wherein the scissor mechanism comprises two X-shaped supports arranged side by side in the width direction, each support being hinged at its middle by a common pivot;

3. A portable scissor lift according to claim 2, wherein the lifting platform is provided with a support extension slidably arranged in a longitudinal direction; the base is provided with a bottom extension part which is arranged in a sliding manner along the length direction.

4. A portable scissor lift according to claim 3, wherein each support frame and the lifting platform have two attachment points arranged along the length, wherein the attachment point adjacent the support extension is hinged and the other attachment point is a sliding attachment;

5. A portable scissor lift according to claim 4, wherein the lift platform has a first lengthwise extending slide track, the support extension being slidably mounted in the first slide track;

6. A portable scissor lift according to claim 2, wherein the base is rectangular and forms a first rectangular frame with itself; the lifting platform is rectangular and forms a second rectangular frame; in the projection in the height direction, the second rectangular frame is positioned in the first rectangular frame.

7. The portable scissor lift of claim 6, wherein the support bracket is positioned within a gap between the first rectangular frame and the second rectangular frame in the width direction.

8. The portable scissor lift of claim 1, further comprising a self-locking mechanism for limiting a spatial state of the scissor mechanism, the self-locking mechanism comprising:

9. The portable scissor lift of claim 8, wherein the self-locking mechanism further comprises a release block hinged to the latch tongue and having an open state opening the latch tongue and an operative state covering the latch tongue, the release block in the operative state separating the latch tongue from the lock block by the release block;

10. A portable scissor lift according to claim 1, wherein the roller set includes at least three rollers, each roller being positioned between the roller and the base:

a fixing base connected with the base

and the pressure spring is abutted between the wheel seat and the fixed seat.