CN212475974U

CN212475974U - Scissor type hydraulic lifting platform

Info

Publication number: CN212475974U
Application number: CN202021157453.2U
Authority: CN
Inventors: 杨自建
Original assignee: Xionghao Machinery Technology Xiangshan Co ltd
Current assignee: Xionghao Machinery Technology Xiangshan Co ltd
Priority date: 2020-06-19
Filing date: 2020-06-19
Publication date: 2021-02-05
Anticipated expiration: 2030-06-19

Abstract

The utility model relates to the technical field of lifting equipment, in particular to a scissor type hydraulic lifting platform, which comprises a base, a bearing platform, two groups of scissor type lifting arms and a first one-way hydraulic cylinder, wherein each group of scissor type lifting arms comprises a plurality of cross arms which are formed by hinging two connecting rods; the upper ends of the two connecting rods on the same horizontal height and close to the inner side are respectively provided with a support frame, the upper ends of the two connecting rods on the same horizontal height and close to the inner side are respectively connected with a first horizontal rod, and the lower ends of the two connecting rods on the lowest side and close to the outer side are connected with a second horizontal rod. Its simple structure, rationally distributed, when the plummer descends to lower dead center, every first horizontal pole all plays the supporting role to two support frames that its top was adjoined, and the second horizontal pole plays the supporting role to two support frames that its top was adjoined, can avoid the plummer and the heavy object on it to crush first one-way pneumatic cylinder.

Description

Scissor type hydraulic lifting platform

Technical Field

The utility model relates to a jacking equipment technical field specifically is a cut fork hydraulic lifting platform.

Background

The scissor type hydraulic lifting platform is mainly used for lifting, loading and unloading goods from a basement to floors in the logistics industry, production lines and can also be used for lifting stages, lifting operation platforms and the like. The product has the advantages of stable structure, low failure rate, reliable operation, safety, high efficiency, simple and convenient maintenance and the like.

The lifting of the existing scissor type hydraulic lifting platform is generally controlled by adopting a one-way hydraulic cylinder to lift, when the lifting platform needs to descend, the lifting platform can automatically descend only by opening a pressure release valve on the one-way hydraulic cylinder under the action of the gravity of the lifting platform and a heavy object, and when the lifting platform descends to the lowest position, the gravity of the lifting platform and the heavy object can act on a piston of the one-way hydraulic cylinder, so that the one-way hydraulic cylinder is easily burst. In addition, in order to reduce the whole weight of the lifting platform, most of the existing scissor-type lifting arms are made by hinging pipes with hollow structures, the purpose can be achieved by the hinging mode, but the contact surface between the pipes with the hollow structures and a hinge shaft is small, and the unit stress on the contact surface is large, so that the pipes and the hinge shaft are easy to deform, and the service life of the lifting platform is greatly shortened. In addition, after the existing lifting platform is lifted, once the hydraulic cylinder fails, safety accidents are easily caused.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a scissor-type hydraulic lift platform to solve the above-mentioned deficiencies in the background art.

In order to achieve the above object, the utility model provides a following technical scheme: a scissor type hydraulic lifting platform comprises a base and a bearing platform, wherein two groups of mutually parallel scissor type lifting arms and a first one-way hydraulic cylinder for driving the scissor type lifting arms to lift are arranged between the base and the bearing platform, and each group of scissor type lifting arms comprises a plurality of cross arms which are sequentially hinged from bottom to top and are formed by mutually hinging two connecting rods; the lower ends of the two connecting rods which are positioned on the two cross arms at the lowest part and are close to the inner side are hinged on the base, and the lower ends of the two connecting rods which are positioned on the two cross arms at the lowest part and are close to the outer side are provided with first pulleys which can be matched on the base in a sliding manner; the upper ends of the two connecting rods which are positioned on the two uppermost crossed arms and are close to the outer sides are hinged on the bearing table, and the upper ends of the two connecting rods which are positioned on the two uppermost crossed arms and are close to the inner sides are provided with second pulleys which can be matched with the bearing table in a sliding mode; the upper ends of the two connecting rods which are positioned on the two cross arms at the same horizontal height and are close to the inner side are respectively provided with a supporting frame, a first horizontal rod is connected between the upper ends of the two connecting rods which are positioned on the two cross arms at the same horizontal height and are close to the inner side, and a second horizontal rod is connected between the lower ends of the two connecting rods which are positioned on the two cross arms at the lowest position and are close to the outer side; when the bearing platform descends to a bottom dead center, each first horizontal rod supports two adjacent supporting frames above the first horizontal rod, and the second horizontal rods support two adjacent supporting frames above the second horizontal rod.

The beneficial effects of the utility model reside in that: the utility model has simple structure and reasonable layout; when the bearing platform descends to the bottom dead center, each first horizontal rod supports two adjacent supporting frames above the first horizontal rod, and the second horizontal rods support two adjacent supporting frames above the second horizontal rod, so that the first one-way hydraulic cylinder is prevented from being crushed by the bearing platform and a heavy object on the bearing platform.

Preferably, the support frame includes mounting panel, bolt and nut, the mounting panel is installed in the upper end of connecting rod, it is equipped with the through-hole to run through perpendicularly on the upper surface of mounting panel, nut coaxial arrangement is in the upper end of through-hole, the bolt runs through behind the through-hole with the nut spiro union. The advantages are that: through rotating the regulation the bolt can be ensured first horizon bar and second horizon bar all can play the supporting role to the bolt, have reduceed greatly the installation degree of difficulty of bolt.

Preferably, the upper surface of the mounting plate, the upper surface of the first horizontal bar, and the upper surface of the second horizontal bar are parallel to each other. The advantages are that: because the nut is coaxial with the through-hole, just the upper surface of through-hole perpendicular to mounting panel works as the upper surface of mounting panel, the upper surface of first horizon bar and the upper surface of second horizon bar are parallel to each other, the terminal surface of the big end of bolt could all be pressed on first horizon bar or second horizon bar.

Preferably, the connecting rod is hollow tubular structure, just articulated position between the connecting rod all is equipped with the support piece that is used for increasing the hinge face, support piece includes the hinge, cup joints the self-lubricating bearing on the hinge and cup joints the bearing housing on self-lubricating bearing, run through on the connecting rod and be equipped with the mounting hole that is used for installing the bearing housing. The advantages are that: through the support piece, the contact area between the hinge shaft and the connecting rod is greatly improved, so that the resistance and the transformation capacity of the hollow tubular connecting rod are greatly improved, and the service lives of the connecting rod and the hinge shaft are further prolonged.

Preferably, one end of the hinge shaft integrally axially protrudes with a limiting convex column, the periphery of the limiting convex column is matched with a fixing sheet, and the fixing sheet is fixed on the connecting rod. The advantages are that: the fixing piece is fixed on the connecting rod through a hinge shaft.

Preferably, the bearing sleeve is provided with a convex ring which is integrally and radially protruded and used for separating the two connecting rods. The advantages are that: the two connecting rods can be separated by the convex ring, and friction between two adjacent surfaces of the two connecting rods is prevented when the two connecting rods rotate.

Preferably, be located two the two of the below the cross arm and the outside that is close to two connecting rods in the outside all articulates there is the check lock lever, the edge of base is integrative to be formed with the safe edge structure of upwards overturning, and works as when the plummer rises to the top dead center, the check lock lever can contradict on the safe edge structure. The advantages are that: when the plummer rises to the top dead center, can through with the locking lever supports on the safe edge structure, thereby prevents the plummer descends.

Preferably, the two cross arms located at the lowest position and the two connecting rods close to the outer sides are respectively provided with a limiting screw for preventing the locking rod from abutting against the upper surface of the base. The advantages are that: if the action of the limit screw is not available, once the locking rod touches the upper surface of the base, the bearing platform cannot descend normally, and safety accidents are easily caused.

Preferably, the bearing table comprises a base and a table plate, one end of the table plate is hinged to the base, and a second one-way hydraulic cylinder used for driving the other end of the table plate to rise is arranged between the base and the table plate. The advantages are that: the bedplate can be lifted by the second one-way hydraulic cylinder, so that the unloading is convenient.

Preferably, the base is integrally provided with a limiting column for ensuring that the bedplate keeps horizontal. The advantages are that: on one hand, the bedplate can be ensured to be kept horizontal after being lowered; on the other hand, the second one-way hydraulic cylinder can also be prevented from being crushed by the bedplate and the weight thereon.

Drawings

Fig. 1 is a perspective view (raised state) of an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at I;

fig. 3 is a perspective view (lowered state) of an embodiment of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3 at II;

FIG. 5 is an enlarged view of a portion of FIG. 3 at III;

fig. 6 is a schematic perspective view of a support member according to an embodiment of the present invention;

fig. 7 is a perspective exploded view of fig. 6.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present embodiments more clearly, and the protection scope of the present invention is not limited thereby.

Referring to fig. 1 to 7, in an embodiment of the present invention, a scissor type hydraulic lifting platform includes a base 1 and a bearing platform 2, the base 1 and the bearing platform 2 are provided with two sets of scissor type lifting arms 3 parallel to each other and a first one-way hydraulic cylinder 100 for driving the scissor type lifting arms 3 to rise, each set of the scissor type lifting arms 3 includes two cross arms hinged from bottom to top in sequence and formed by two connecting rods 31 hinged to each other (the number of the cross arms is not limited). The lower ends of the two connecting rods 31 which are positioned on the two lowermost cross arms and are close to the inner side are hinged on the base 1, and the lower ends of the two connecting rods 31 which are positioned on the two lowermost cross arms and are close to the outer side are provided with first pulleys 300 which can be matched with the base 1 in a sliding manner; the upper ends of the two connecting rods 31 which are positioned on the two uppermost cross arms and are close to the outer sides are hinged on the bearing platform 2, and the upper ends of the two connecting rods 31 which are positioned on the two uppermost cross arms and are close to the inner sides are provided with second pulleys 400 which can be matched on the bearing platform 2 in a sliding manner. Two that are located same level the upper end that just is close to two inboard connecting rods 31 on the crisscross arm all is equipped with support frame 4, two that are located same level all be connected with first horizon bar 32 between the upper end that just is close to two inboard connecting rods 31 on the crisscross arm, be located two of the below be connected with second horizon bar 33 between the lower extreme that just is close to two outside connecting rods 31 on the crisscross arm. When the bearing platform 2 needs to be lifted, the bearing platform 2 can be jacked up through the scissor-type lifting arms 3 only by supplying oil to the two first one-way hydraulic cylinders 100; when the bearing table 2 needs to be lowered, only the pressure of the first one-way hydraulic cylinder 100 needs to be relieved; after the pressure is released, under the action of the bearing platform 2 and the weight thereon, the bearing platform 2 is automatically lowered until the bearing platform 2 is lowered to the bottom dead center, the first horizontal rod 32 can support the two adjacent supporting frames 4 above the first horizontal rod, and the second horizontal rod 33 can support the two adjacent supporting frames 4 above the second horizontal rod (as shown in fig. 3 and 4), so that the bearing platform 2 and the weight thereon are prevented from being pressed on the first unidirectional hydraulic cylinder 100 all the time, and the bearing platform 2 and the weight thereon are prevented from crushing the first unidirectional hydraulic cylinder 100.

In this embodiment, the support frame 4 includes a mounting plate 31, a bolt 42 and a nut 43, the mounting plate 31 is mounted at the upper end of the connecting rod 31, a through hole vertically penetrates through the upper surface of the mounting plate 31, the nut 43 is coaxially mounted at the upper end of the through hole, and the bolt 42 is screwed with the nut 43 after penetrating through the through hole. By adjusting the bolt 42 in a rotating manner, the first horizontal rod 32 and the second horizontal rod 33 can support the bolt 42, and the difficulty in mounting the bolt 42 is greatly reduced.

In this embodiment, the upper surface of the mounting plate 31, the upper surface of the first horizontal bar 32, and the upper surface of the second horizontal bar 33 are parallel to each other. Because the nut 43 is coaxial with the through hole, and the through hole is perpendicular to the upper surface of the mounting plate 31, when the upper surface of the mounting plate 31, the upper surface of the first horizontal rod 32 and the upper surface of the second horizontal rod 33 are parallel to each other, the end surface of the large end of the bolt 42 can be completely pressed on the first horizontal rod 32 or the second horizontal rod 33 (as shown in fig. 4), so as to prevent the large end of the bolt 42 from being locally pressed.

In this embodiment, the connecting rods 31 are hollow tubular structures, the hinge positions between the connecting rods 31 are provided with supporting pieces 5 for increasing hinge surfaces, each supporting piece 5 includes a hinge shaft 51, a self-lubricating bearing 52 sleeved on the hinge shaft 51, and a bearing sleeve 53 sleeved on the self-lubricating bearing 52, and the connecting rod 31 is provided with a mounting hole 311 for mounting the bearing sleeve 53 in a penetrating manner. By the support 5, a contact area between the hinge shaft 51 and the connecting rod 31 is greatly increased, so that the resistance to deformation of the hollow tubular connecting rod 31 is greatly improved, and the service lives of the connecting rod 31 and the hinge shaft 51 are prolonged.

In this embodiment, one end of the hinge shaft 51 integrally protrudes with a limiting convex pillar 511 in the axial direction, the periphery of the limiting convex pillar 511 is matched with a fixing plate 54 through screw installation, and the fixing plate 54 is fixed on the connecting rod 31 through a screw, so that the hinge shaft 51 is fixed on the connecting rod 31.

In this embodiment, the bearing housing 53 integrally and radially protrudes with a convex ring 531 for separating the two connecting rods 31, and the two connecting rods 31 can be separated by the convex ring 531, so that friction between two adjacent surfaces of the two connecting rods 31 can be prevented when the two connecting rods 31 rotate.

In this embodiment, the locking rods 6 are hinged to the outer sides of the two connecting rods 31 which are positioned on the two lowest cross arms and close to the outer sides, and the edge of the base 1 is integrally turned upwards to form a protective edge structure 11; when the plummer 2 rises to the top dead center, the plummer 2 can be prevented from falling down accidentally by abutting the locking rod 6 against the edge protection structure 11 (as shown in fig. 1).

In this embodiment, the outer sides of the two connecting rods 31 on the two lowermost cross arms and close to the outer sides are respectively provided with a limiting screw 7 for preventing the locking rod 6 from abutting against the upper surface of the base 1. As shown in fig. 1, when the plummer 2 is lifted to the top dead center (i.e. when the first unidirectional hydraulic cylinder 100 is ejected to the maximum stroke), the locking rod 6 just can abut against the edge protection structure 11, and the locking rod 6 cannot abut against the upper surface of the base 1 when rotating clockwise; as shown in fig. 5, under the limit of the limit screw 7, the locking lever 6 cannot abut against the upper surface of the base 1 even when rotating counterclockwise. If the action of the limit screw 7 is not available, the locking rod 6 can rotate anticlockwise to abut against the upper surface of the base 1, and once the locking rod 6 abuts against the upper surface of the base 1, the bearing table 2 cannot descend normally, and safety accidents are easily caused.

In this embodiment, the carrier 2 includes a base 21 and a platen 22, one end of the platen 22 is hinged to the base 21, and a second unidirectional hydraulic cylinder 200 for driving the other end of the platen 22 to rise is disposed between the base 21 and the platen 22, so that the platen 22 can be lifted by the second unidirectional hydraulic cylinder 200, thereby facilitating unloading.

In this embodiment, the base 21 is integrally provided with a stopper column 23 for ensuring that the platen 22 is kept horizontal. On one hand, the limiting columns 23 can ensure that the bedplate 22 can be kept horizontal after being lowered; on the other hand, the platen 22 and the weight thereon can be prevented from crushing the second unidirectional hydraulic cylinder 200.

The working principle is as follows:

when the bearing table 2 needs to be lifted (as shown in fig. 1), the bearing table 2 can be driven to lift by the first one-way hydraulic cylinder 100; when the bearing platform 2 rises to the top dead center, the locking rod 6 can be rotated clockwise to be abutted against the edge protection structure 11, so that the bearing platform 2 can be prevented from falling due to accidents. In addition, the bedplate 22 can be jacked up to a proper angle through the second one-way hydraulic cylinder 200, so that the unloading is convenient; after the unloading is finished, the pressure of the second one-way hydraulic cylinder 200 is relieved, and the bedplate 22 automatically starts to be leveled under the action of the gravity of the bedplate 22 until the bedplate 22 contacts the limiting columns 23 (in the process, the bedplate 22 can be ensured to be kept horizontal through the limiting of the limiting columns 23, and the gravity of the bedplate 22 and the heavy objects on the bedplate can be prevented from acting on the second one-way hydraulic cylinder 200, so that the second one-way hydraulic cylinder 200 is prevented from being damaged by jacking).

When the plummer 2 needs to be lowered (as shown in fig. 3), the locking rod 6 is firstly rotated counterclockwise to be separated from the edge protection structure 11, and under the limit of the limit screw 7 (as shown in fig. 5), the locking rod 6 is ensured not to be rotated counterclockwise to abut against the upper surface of the base 1 (once the locking rod 6 abuts against the upper surface of the base 1, the plummer 2 is limited from being lowered normally, and even safety accidents are caused). Then give first one-way hydraulic cylinder 100 pressure release again under the action of gravity of plummer 2 and its upper heavy object, plummer 2 is automatic to begin to descend, until being located two of top the terminal surface of the big head end of bolt 42 is contradicted with the upper surface of first horizon bar 32, and is located two of below the terminal surface of the big head end of bolt 42 is contradicted with the upper surface of second horizon bar 33, thereby to bear platform 2 and its upper heavy object play the supporting role, and then avoid will first one-way hydraulic cylinder 100 pushes up badly. In the process, because the upper surface of the mounting plate 31, the upper surface of the first horizontal rod 32 and the upper surface of the second horizontal rod 33 are parallel to each other, the through hole is perpendicular to the upper surface of the mounting plate 31, and the nut 43 and the through hole are coaxially arranged, the bolt 42 is perpendicular to the upper surface of the first horizontal rod 32 and the upper surface of the second horizontal rod 33 respectively, so that the end surface of the big end of the bolt 42 can be ensured to be abutted against the upper surfaces of the first horizontal rod 32 and the second horizontal rod 33, and the big end of the bolt 42 is prevented from being locally pressed; in addition, the bolt 42 can be rotated to adjust a suitable length, so that when the plummer 2 descends to the bottom dead center, the end surfaces of the big heads of the two bolts 42 located above just abut against the upper surface of the first horizontal rod 32, and the end surfaces of the big heads of the two bolts 42 located below just abut against the upper surface of the second horizontal rod 33.

In addition, under the action of the support 5 (as shown in fig. 6 and 7), the self-lubricating bearing 52 is firstly sleeved on the hinge shaft 51, the two bearing sleeves 53 are sleeved on the self-lubricating bearing 52, the two connecting rods 31 are respectively sleeved on the two bearing sleeves 53, finally, the fixing piece 54 is fixed on the limiting convex column 511 through a screw, and the fixing piece 54 is fixed on the connecting rod 31 on the outer side through a screw. In this process, due to the supporting member 5, the contact area between the two connecting rods 31 and the hinge shaft 51 is greatly increased, so that the hollow tubular connecting rod 31 is effectively prevented from deforming, and the service lives of the connecting rod 31 and the hinge shaft 51 are prolonged. Moreover, the rotation resistance between the two connecting rods 31 is greatly reduced under the action of the self-lubricating bearings 52; moreover, under the effect of the convex ring 531, the two connecting rods 31 are separated from each other, so that friction between two surfaces, which are close to each other, of the two connecting rods 31 during rotation is avoided, and further, the rotation resistance between the two connecting rods 31 is further reduced, and the lifting flexibility of the bearing platform 2 is greatly improved.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A scissor type hydraulic lifting platform comprises a base (1) and a bearing platform (2), wherein two groups of scissor type lifting arms (3) which are parallel to each other and a first one-way hydraulic cylinder (100) for driving the scissor type lifting arms (3) to lift are arranged between the base (1) and the bearing platform (2), and each group of scissor type lifting arms (3) comprises a plurality of cross arms which are sequentially hinged from bottom to top and are formed by mutually hinging two connecting rods (31); the lower ends of two connecting rods (31) which are positioned on the two cross arms at the lowest part and are close to the inner side are hinged on the base (1), and the lower ends of two connecting rods (31) which are positioned on the two cross arms at the lowest part and are close to the outer side are provided with first pulleys (300) which can be matched with the base (1) in a sliding manner; the upper ends of two connecting rods (31) which are positioned on the two uppermost crossed arms and are close to the outer sides are hinged on the bearing table (2), and the upper ends of two connecting rods (31) which are positioned on the two uppermost crossed arms and are close to the inner sides are provided with second pulleys (400) which can be matched with the bearing table (2) in a sliding manner, so that the lifting device is characterized in that the upper ends of two connecting rods (31) which are positioned on the two uppermost crossed arms and are close to the inner sides are provided with supporting frames (4), a first horizontal rod (32) is connected between the upper ends of two connecting rods (31) which are positioned on the two uppermost crossed arms and are close to the inner sides, and a second horizontal rod (33) is connected between the lower ends of two connecting rods (31) which are positioned on the two lowermost crossed arms and are close to the outer sides; when the bearing platform (2) descends to a lower dead point, each first horizontal rod (32) supports two adjacent supporting frames (4) above the first horizontal rod, and each second horizontal rod (33) supports two adjacent supporting frames (4) above the second horizontal rod.

2. A scissor hydraulic lifting platform according to claim 1, wherein the support frame (4) comprises a mounting plate (41), a bolt (42) and a nut (43), the mounting plate (41) is mounted at the upper end of the connecting rod (31), a through hole is vertically arranged on the upper surface of the mounting plate (41) in a penetrating manner, the nut (43) is coaxially mounted at the upper end of the through hole, and the bolt (42) is screwed with the nut (43) after penetrating the through hole.

3. A scissor hydraulic lift platform according to claim 2, wherein the upper surface of the mounting plate (41), the upper surface of the first horizontal bar (32) and the upper surface of the second horizontal bar (33) are parallel to each other.

4. A scissor hydraulic lift platform according to claim 1, wherein the connecting rods (31) are hollow tubular structures, and the hinged positions between the connecting rods (31) are provided with supports (5) for increasing hinged surfaces, the supports (5) comprise a hinged shaft (51), a self-lubricating bearing (52) sleeved on the hinged shaft (51) and a bearing sleeve (53) sleeved on the self-lubricating bearing (52), and the connecting rods (31) are provided with mounting holes (311) for mounting the bearing sleeve (53) in a penetrating manner.

5. A scissor hydraulic lifting platform according to claim 4, wherein one end of the hinge shaft (51) integrally and axially protrudes with a limiting convex column (511), the periphery of the limiting convex column (511) is matched with a fixing plate (54), and the fixing plate (54) is fixed on the connecting rod (31).

6. A scissor hydraulic lift platform according to claim 4, wherein the bearing housing (53) has an integral radially projecting collar (531) separating the two connecting rods (31).

7. A scissor hydraulic lifting platform according to claim 1, wherein the locking rods (6) are hinged to the outer sides of the two connecting rods (31) on the two lowest cross arms and close to the outer sides, the edge of the base (1) is integrally turned upwards to form a protective edge structure (11), and when the bearing platform (2) is lifted to the top dead center, the locking rods (6) can abut against the protective edge structure (11).

8. A scissor hydraulic lift platform according to claim 7, wherein the outer sides of the two connecting rods (31) on the two lowermost cross arms and close to the outer sides are each fitted with a limit screw (7) for preventing the locking bar (6) from abutting against the upper surface of the base (1).

9. A scissor hydraulic lift platform according to any one of claims 1 to 8, wherein the carrier (2) comprises a base (21) and a platform (22), wherein one end of the platform (22) is hinged to the base (21), and a second one-way hydraulic cylinder (200) for driving the other end of the platform (22) to rise is arranged between the base (21) and the platform (22).

10. A scissor hydraulic lift platform according to claim 9, wherein the base (21) is integrally provided with a spacing post (23) for ensuring that the platform (22) is level.