CN221027497U - Self-locking jacking device - Google Patents

Abstract

The utility model provides a self-locking jacking device, which comprises: the device comprises a screw rod mechanism, a fixed seat, a supporting seat, a first fork arm group and a second fork arm group, wherein a screw rod shaft of the screw rod mechanism is rotationally connected with the fixed seat, first connecting parts of the first fork arm group and the second fork arm group are respectively connected with a rotating shaft of the supporting seat, second connecting parts of the first fork arm group and the second fork arm group are respectively connected with the fixed seat and a moving nut rotating shaft of the screw rod mechanism so as to form a connecting rod lifting mechanism, and the connecting rod lifting mechanism is used for lifting/lowering the supporting seat in a linkage manner through displacement distance conversion between the moving nut and the fixed seat. Thereby having the jacking self-locking capability.

Description

Self-locking jacking device

Technical Field

The utility model relates to jacking equipment technology, in particular to a self-locking jacking device.

Background

Along with the continuous expansion of intelligent transportation scenes, AGVs (automatic guided vehicles Automated Guided Vehicle) and AMR (autonomous mobile robots Autonomous Mobile Robot) robots with jacking functions are widely used due to unique functions and obvious freight advantage.

At present, jacking mechanisms in AGVs and AMR robots mainly comprise two design structures, namely a double-square structure (such as a connecting rod jacking type AGV trolley, a patent application publication number CN 112390197A) and a scissors fork structure (such as a scissors fork type jacking mechanism and an AGV trolley, a patent application publication number CN 108285107A).

Compared with other structures, the lifting mechanism with the double-square structure adopts a connecting rod structure, so that larger torque is required in the lifting process under the same load weight, a large-speed reducer and a high-power motor are required to be configured, and the implementation cost is higher; in addition, for the lifting mechanism of the scissor fork structure, in view of the design characteristics of the lifting structure, the number of parts is large, and more internal installation space is required to be provided for the part mechanism, so that the space utilization rate of the AGV and AMR robots is reduced.

Disclosure of utility model

Therefore, the main objective of the present utility model is to provide a self-locking jacking device, which has the capability of jacking and self-locking while reducing the implementation cost and the installation space requirement.

In order to achieve the above object, according to one aspect of the present utility model, there is provided a self-locking jacking device comprising: the device comprises a screw rod mechanism, a fixed seat, a supporting seat, a first fork arm group and a second fork arm group, wherein a screw rod shaft of the screw rod mechanism is rotationally connected with the fixed seat, first connecting parts of the first fork arm group and the second fork arm group are respectively connected with a rotating shaft of the supporting seat, second connecting parts of the first fork arm group and the second fork arm group are respectively connected with the fixed seat and a moving nut rotating shaft of the screw rod mechanism so as to form a connecting rod lifting mechanism, and the connecting rod lifting mechanism is used for lifting/lowering the supporting seat in a linkage manner through displacement distance conversion between the moving nut and the fixed seat.

Preferably, the second connecting parts of the first fork arm set and the second fork arm set are provided with gear teeth so as to form engagement on the fixed seat and the movable nut respectively.

Preferably, the second connecting parts of the first fork arm group and the second fork arm group are respectively connected with the fixed seat and the moving nut rotating shaft of the screw rod mechanism, and overlap to form a scissor structure.

Preferably, wherein each of the first and second sets of arms comprises: at least one pair of link arms, each of which has an arc-shaped curve to define a buffer portion at the curve of the link arm.

Preferably, the self-locking jacking device further comprises: and the driving motor is connected to the fixed seat and is in transmission connection with the screw rod shaft.

Preferably, the self-locking jacking device further comprises: the driving motor is in transmission connection with the screw rod shaft through the transmission mechanism, and the driving motor and the transmission mechanism are respectively connected with the fixing seat.

Preferably, the transmission mechanism is any one of a gear transmission mechanism and a belt pulley transmission mechanism.

Preferably, wherein each of the first and second sets of arms comprises: and after the support seat is allowed to descend, a jaw area is defined at the bending positions of the connecting rod arms of the first and second fork arm groups so as to accommodate the transmission mechanism.

Preferably, the self-locking jacking device further comprises: the adjusting piece, wherein preset position department is equipped with the regulation screw on the supporting seat, adjusting piece and the regulation screw bolted connection of different positions department to the position of adjusting piece on the supporting seat, the first connecting portion of first yoke group, second yoke group is connected with the adjusting piece pivot on the supporting seat respectively.

Preferably, the self-locking jacking device further comprises: a support shaft, wherein the first and second prong sets each include: the two pairs of connecting rod arms are arranged in mirror image positions, and the supporting shafts are arranged between the two pairs of connecting rod arms and are respectively connected with the first connecting parts of the connecting rod arms and the rotating shafts of the supporting seats.

The self-locking jacking device provided by the utility model has the advantages that the first fork arm group and the second fork arm group are driven by the screw rod nut to perform opening and closing motions so as to link the supporting seat to form the lifting/lowering connecting rod lifting mechanism, so that the self-locking characteristic of the screw rod can be utilized, the jacking device has no falling risk even if the jacking device loses driving force in a high-position state, and meanwhile, compared with the jacking structure of the traditional scissor fork, the special design connecting rod lifting mechanism has simpler integral structure and fewer parts, thereby reducing the requirement on installation space and improving the space utilization rate. Meanwhile, compared with the traditional quadrilateral connecting rod structure, the connecting rod lifting mechanism has the advantages that under the condition of equal torque output, the lifting weight is larger due to the fact that tension force decomposition does not exist. In addition, in some examples, the driving motor and the transmission mechanism are always suspended between the supporting seats, so that the installation and arrangement are more convenient.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 is a schematic perspective view of a self-locking jacking device according to a first embodiment of the present utility model;

FIG. 2 is a schematic side view of a self-locking lifting device according to a first embodiment of the present utility model;

FIG. 3 is a schematic diagram showing a cross-sectional side view of a self-locking jacking device A-A according to a first embodiment of the present utility model;

Fig. 4 is a schematic perspective view of a self-locking jacking device according to a second embodiment of the present utility model.

Description of the reference numerals

The screw mechanism 1, the fixed seat 2, the supporting seat 3, the first fork arm set 4, the second fork arm set 5, the link arm 6, the driving motor 7, the transmission mechanism 8, the adjusting piece 9, the screw shaft 11, the moving nut 12, the gear teeth 61, the buffer part 62, the jaw area 63, the supporting shaft 64, the base 81, the driving wheel 82, the transmission wheel 83, the linkage wheel 84 and the transmission belt 85.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance. While the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion.

Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "configured," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in view of the specific circumstances in combination with the prior art. Furthermore, embodiments of the utility model and features of the embodiments may be combined with each other without conflict. And one or more of the illustrated components may be necessary or optional, and the relative positional relationship between the various components illustrated above may be adjusted as desired.

Referring to fig. 1 to 3, in order to achieve the self-locking capability, an example of the self-locking jacking device provided by the present utility model includes: the screw rod mechanism comprises a screw rod mechanism 1, a fixed seat 2, a supporting seat 3, a first fork arm set 4 and a second fork arm set 5, wherein one end of a screw rod shaft 11 of the screw rod mechanism 1 is inserted into a through hole of the fixed seat 2 to form rotary connection, a first connecting part of the first fork arm set 4 and a first connecting part of the second fork arm set 5 are respectively connected with a rotating shaft of the supporting seat 3, a second connecting part of the first fork arm set 4 and a second connecting part of the second fork arm set 5 are respectively connected with the fixed seat 2 and a rotating shaft of a moving nut 12 of the screw rod mechanism 1 to form a connecting rod lifting mechanism, and the connecting rod lifting mechanism is used for linking the first fork arm set 4 and the second fork arm set 5 to open and close through displacement distance conversion between the moving nut 12 and the fixed seat 2 so as to control lifting/lowering of the supporting seat 3.

Specifically, as shown in fig. 1 to 2, the first and second fork arm sets 4 and 5 preferably each include: two pairs of link arms 6, wherein the first connecting parts of the link arms 6 of each pair are respectively connected with the rotating shaft of the supporting seat 3, and the second connecting parts of the link arms 6 of each pair are respectively connected with the fixed seat 2 and the rotating shaft of the moving nut 12.

In an alternative example, gear teeth 61 may be provided on the second connection portions of each pair of link arms 6, so that the second connection portions of each pair of link arms 6 are correspondingly meshed at the fixing seat 2 and the moving nut 12, thereby ensuring that a relatively fixed angular position and opening and closing degree between each pair of link arms 6 can be maintained during linkage, and improving the stability of the mechanism.

In addition, in other alternative examples, the second connection parts of the link arms 6 of the first and second fork arm sets 4 and 5 may be respectively connected with the fixed seat 2 and the moving nut 12 of the screw rod mechanism 1 in a rotating shaft manner, and overlap to form a scissor structure, so that a transmission structure of the link lifting mechanism may also be realized.

Wherein, in order to automatically control the lifting device to lift, in a preferred example, the self-locking lifting device further comprises: and the driving motor 7, wherein the driving motor 7 is connected to the fixed seat 2 and is in transmission connection with the screw rod shaft 11. Thereby, the drive motor 7 rotates the screw shaft 11 to drive the moving nut 12 to displace, so as to control the lifting/lowering of the supporting seat 3.

On the other hand, in order to facilitate subsequent installation and arrangement of the jacking device, if the driving motor 7 is arranged in the space between the supporting seats 3, the installation space requirement can be greatly reduced, and for this example, the self-locking jacking device further comprises: the driving motor 7 and the transmission mechanism 8, wherein the driving motor 7 is in transmission connection with the screw rod shaft 11 through the transmission mechanism 8, and the driving motor 7 and the transmission mechanism 8 are respectively connected with the fixing seat 2 so as to be suspended between the supporting seats 3.

As shown in fig. 1, the transmission mechanism 8 in this example is a gear transmission mechanism, which includes: the base 81, the action wheel 82, drive wheel 83, interlock wheel 84, wherein base 81 is connected with fixing base 2, driving motor 7 connects on the base 81 first side, and its drive end is connected with the action wheel 82 that sets up in the base 81 second side, interlock wheel 84 sets up on the base 81 second side, and its one end passes base 81 and is connected with lead screw axle 11, drive wheel 83 is connected with base 81 second side pivot to mesh the transmission respectively with action wheel 82, interlock wheel 84.

In yet other alternative examples, as shown in fig. 4, the transmission mechanism 8 may also be a pulley transmission mechanism, which includes: the base 81, action wheel 82, drive belt 85, interlock wheel 84, wherein base 81 is connected with fixing base 2, driving motor 7 connects on the base 81 first side, and its drive end is connected with the action wheel 82 of setting in the base 81 second side, interlock wheel 84 sets up on the base 81 second side, and its one end passes base 81 and is connected with lead screw axle 11, drive belt 85 cup joints with action wheel 82, interlock wheel 84 respectively to form the band pulley transmission.

Further, as shown in fig. 2, in an alternative example, each link arm 6 is preferably curved in an arc shape, so that a buffer portion 62 is defined at the curved portion of the link arm 6, and by means of this buffer portion 62, on the one hand, the direction of gravity when the support seat 3 bears load can be guided and converted to the second connection portion of the link arm 6, so as to be a thrust to the moving nut 12 and the fixing seat 2, and on the other hand, by means of this curved portion, the bearing gravity of the support seat 3 can be buffered, and the resistance of the link arm 6 to the deformation under load can be improved, so as to further improve the bearing capacity of the link arm 6.

It should be noted that, in order to increase the lifting travel distance of the link lifting mechanism, as shown in fig. 2, the bending degree of the bending portion of the link arm 6 of the first and second fork arm sets 4 and 5 is skillfully set to allow the support base 3 to descend, and then a jaw area 63 can be defined at the bending portion of the link arm 6 of the first and second fork arm sets 4 and 5 to accommodate the form of the transmission mechanism 8. Thereby avoiding mechanism interference, and raising the descending contraction limit of the connecting rod lifting mechanism as much as possible so as to reduce the storage space required by the jacking device.

Further, as shown in fig. 1 and fig. 4, in order to facilitate adjusting the lifting/lowering distance of the lifting device, in an alternative example, the self-locking lifting device further includes: the adjusting piece 9 is provided with adjusting screw holes at preset positions on the supporting seat 3 to define a plurality of adjustable positions, and the adjusting piece 9 is connected with the adjusting screw holes at different positions by bolts, so that the positions of the adjusting piece 9 on the supporting seat 3 can be adjusted, and the lifting/lowering distance of the jacking device can be adjusted in the stroke of the screw rod mechanism 1 after the first connecting parts of the connecting rod arms 6 of the first fork arm set 4 and the second fork arm set 5 are respectively connected with the rotating shafts of the adjusting piece 9 on the supporting seat 3.

Further, as shown in fig. 1, 3 and 4, in order to improve structural stability of the link lifting mechanism, in an alternative example, the self-locking lifting device further includes: a support shaft 64, wherein each of the first and second prong sets 4 and 5 includes: the two pairs of link arms 6 arranged in mirror image positions, the supporting shaft 64 is arranged between the two pairs of link arms 6 and is respectively connected with the first connecting part of each link arm 6 and the rotating shaft of the supporting seat 3 so as to support each pair of link arms 6 to keep a preset distance, and the structural stability is improved.

In summary, according to the self-locking lifting device provided by the utility model, the first fork arm set 4 and the second fork arm set 5 are driven by the screw and nut to perform opening and closing movements, so that the connecting rod lifting mechanism capable of lifting/lowering is formed by the linkage support seat 3, the screw self-locking characteristic can be utilized, the lifting device does not have the falling risk even if the lifting device loses the driving force in a high-position state, and meanwhile, compared with the lifting structure of the traditional scissors and fork, the special design of the connecting rod lifting mechanism is simpler in integral structure and fewer in parts, thereby reducing the requirement on installation space and improving the space utilization rate. Meanwhile, compared with the traditional quadrilateral connecting rod structure, the connecting rod lifting mechanism has the advantages that under the condition of equal torque output, the lifting weight is larger due to the fact that tension force decomposition does not exist. In addition, in some examples, the driving motor 7 and the transmission mechanism 8 are always suspended between the supporting seats 3, so that the installation and arrangement are more convenient.

The preferred embodiments of the utility model disclosed above are intended only to assist in the explanation of the utility model. The preferred embodiments are not exhaustive or to limit the utility model to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best understand and utilize the utility model. The utility model is to be limited only by the following claims and their full scope and equivalents, and any modifications, equivalents, improvements, etc., which fall within the spirit and principles of the utility model are intended to be included within the scope of the utility model.

In addition, any combination of various embodiments of the present utility model may be performed, so long as the concept of the embodiments of the present utility model is not violated, and the disclosure of the embodiments of the present utility model should also be considered.

Claims (10)

1. The utility model provides a self-locking jacking device which characterized in that includes: the device comprises a screw rod mechanism, a fixed seat, a supporting seat, a first fork arm group and a second fork arm group, wherein a screw rod shaft of the screw rod mechanism is rotationally connected with the fixed seat, first connecting parts of the first fork arm group and the second fork arm group are respectively connected with a rotating shaft of the supporting seat, second connecting parts of the first fork arm group and the second fork arm group are respectively connected with the fixed seat and a moving nut rotating shaft of the screw rod mechanism so as to form a connecting rod lifting mechanism, and the connecting rod lifting mechanism is used for lifting/lowering the supporting seat in a linkage manner through displacement distance conversion between the moving nut and the fixed seat.

2. The self-locking jacking device of claim 1, wherein the second connecting portions of the first and second yoke groups are provided with gear teeth to form engagement with the fixing base and the moving nut, respectively.

3. The self-locking jacking device according to claim 1, wherein the second connecting parts of the first fork arm group and the second fork arm group are respectively connected with the fixed seat and the moving nut rotating shaft of the screw rod mechanism and are overlapped to form a scissor fork structure.

4. The self-locking jacking device of claim 1, wherein said first and second sets of arms each include: at least one pair of link arms, each of which has an arc-shaped curve to define a buffer portion at the curve of the link arm.

5. The self-locking jacking device of claim 1, further comprising: and the driving motor is connected to the fixed seat and is in transmission connection with the screw rod shaft.

6. The self-locking jacking device of claim 1, further comprising: the driving motor is in transmission connection with the screw rod shaft through the transmission mechanism, and the driving motor and the transmission mechanism are respectively connected with the fixing seat.

7. The self-locking jacking device of claim 6, wherein said transmission mechanism is any one of a gear transmission mechanism and a pulley transmission mechanism.

8. The self-locking jacking device of either one of claims 6 or 7, wherein each of said first and second sets of arms includes: and after the support seat is allowed to descend, a jaw area is defined at the bending positions of the connecting rod arms of the first and second fork arm groups so as to accommodate the transmission mechanism.

9. The self-locking jacking device of claim 1, further comprising: the adjusting piece, wherein preset position department is equipped with the regulation screw on the supporting seat, adjusting piece and the regulation screw bolted connection of different positions department to the position of adjusting piece on the supporting seat, the first connecting portion of first yoke group, second yoke group is connected with the adjusting piece pivot on the supporting seat respectively.

10. The self-locking jacking device of claim 1, further comprising: a support shaft, wherein the first and second prong sets each include: the two pairs of connecting rod arms are arranged in mirror image positions, and the supporting shafts are arranged between the two pairs of connecting rod arms and are respectively connected with the first connecting parts of the connecting rod arms and the rotating shafts of the supporting seats.