A micro lifting device

Abstract

The present invention relates to the technical field of lifting mechanisms, and in particular to a micro-lifting device, which includes a box, an automatic lifting mechanism, a manual lifting mechanism and a load mounting plate, wherein the automatic lifting mechanism includes an automatic transmission device, a driving motor and an automatic lifting device, the automatic transmission device includes an active gear and a plurality of lifting gears, the automatic lifting device includes a lifting screw base, a lifting screw, a nut sleeve and a support column, the lifting screw is located in a hollow structure, the manual lifting mechanism includes a manual gear, a manual rotating sleeve, a screw sleeve passing through the center hole of the manual gear at the bottom, a spring mounted on the bottom of the screw sleeve and a fine-pitch nut mounted on the top of the screw sleeve, a first guide rod is provided in the screw sleeve, and the load mounting plate is fixedly mounted on the top of the plurality of support columns and the first guide rod. The device provided by the present invention can realize two modes of automatic lifting and manual lifting, and can not only realize load lifting in the case of power failure, but also can self-lock at any position.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting mechanisms, and in particular to a micro lifting device. Background Art

[0002] Existing lifting devices include: scissor type, hydraulic type, pneumatic type, etc. These lifting devices are often relatively large and suitable for general working conditions. And most of them need to use media such as oil or gas source to achieve the function of transmitting force. When the device leaks, it will cause failure to be used. Or in some specific situations, such as unmanned vehicle-mounted devices, the above lifting devices often fail to achieve the expected ideal state. And in some emergency situations, such as power failure, the above lifting devices will not work normally due to lack of power source. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a micro lifting device which can realize both automatic lifting and manual lifting, can not only realize load lifting in the case of power failure but also can self-lock at any position.

[0004] The present invention is achieved through the following technical solutions:

[0005] A micro lifting device, comprising a box, an automatic lifting mechanism, a manual lifting mechanism and a load mounting plate, wherein the automatic lifting mechanism comprises an automatic transmission device, a driving motor and an automatic lifting device, wherein the automatic transmission device comprises a driving gear located at the bottom of the box and a plurality of lifting gears meshing with the driving gear, wherein the driving motor is fixedly installed in the box to drive the driving gear to rotate, wherein the automatic lifting device comprises a lifting screw base fixedly connected to the bottom of the lifting gear, a lifting screw passing through a central hole of the lifting gear, a nut sleeve mounted on the lifting screw and a support column fixedly connected to the top of the nut sleeve, wherein the support column is a hollow structure, wherein the lifting screw passes through the bottom of the support column and is located in the hollow structure, wherein the manual lifting mechanism comprises a manual gear, a manual rotating sleeve fixedly connected to the top of the manual gear, a screw sleeve having a bottom passing through the central hole of the manual gear and fixedly connected to the bottom of the box, a spring mounted on the bottom of the screw sleeve and extending into the central hole of the manual gear and a fine-pitch nut mounted on the top of the screw sleeve, wherein a first guide rod is arranged in the screw sleeve, and wherein the load mounting plate is fixedly installed on the tops of the plurality of support columns and the first guide rod.

[0006] Furthermore, an outer shaft sleeve is mounted on the bottom of the support column.

[0007] Furthermore, a micro-lifting device also includes a guide mechanism, which includes a guide sleeve fixedly connected to the box body and a second guide rod whose bottom is located inside the guide sleeve and whose top is fixedly connected to the load mounting plate.

[0008] Optimally, there are two lifting gears, which are spaced apart from the manual gear and the guide sleeve relative to the driving gear.

[0009] Advantageous Effects of the Invention

[0010] The present invention protects a micro lifting device, which can drive the driving gear to rotate by driving the motor during normal operation, thereby driving the automatic lifting device to rise and fall, and realizing the lifting and falling of the load mounting plate. At this time, the manual gear and the driving gear are in a separated state, and the manual lifting mechanism plays a supporting and guiding role; when the power is off, the manual gear is meshed with the driving gear, and the manual rotating sleeve is rotated, and the manual gear drives the driving gear to rotate, and the driving gear rotation drives the lifting gear to rotate, realizing the lifting and falling of the load. And through the cooperation of the fine pitch thread and the screw sleeve thread, the manual gear can be self-locked at any position, which can not only ensure that the manual gear and the driving gear are reliably matched during the manual lifting process, but also facilitate the adjustment of the upper and lower positions of the manual rotating sleeve during the automatic lifting process to avoid obstacles. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic cross-sectional structural diagram of the automatic lifting mechanism of the present invention;

[0012] Figure 2 It is a schematic cross-sectional structural diagram of the manual lifting mechanism of the present invention;

[0013] Figure 3 It is a schematic diagram of the gear meshing structure of the present invention;

[0014] In the figure, 1. box body, 2. lifting gear, 3. driving gear, 4. driving motor, 5. load mounting plate, 6. support column, 7. lifting screw, 8. outer sleeve, 9. nut sleeve, 10. manual gear, 11. manual rotating sleeve, 12. fine pitch nut, 13. first guide rod, 14. spring, 15. screw sleeve, 16. second guide rod, 17. guide sleeve. DETAILED DESCRIPTION

[0015] A micro lifting device comprises a box 1, an automatic lifting mechanism, a manual lifting mechanism and a load mounting plate 5, wherein the automatic lifting mechanism comprises an automatic transmission device, a drive motor 4 and an automatic lifting device, wherein the automatic transmission device comprises a driving gear 3 located at the bottom of the box and a plurality of lifting gears 2 meshing with the driving gears, wherein the drive motor is fixedly installed in the box to drive the driving gear to rotate, and the drive motor can be fixedly installed with the bottom plate of the box, wherein the automatic lifting device comprises a lifting screw 7 passing through the center hole of the lifting gear, a nut sleeve 9 sleeved on the lifting screw and a support column 6 fixedly connected to the top of the nut sleeve, wherein the support column is a hollow structure, wherein the lifting screw passes through the bottom of the support column and is located in the hollow structure, and the lifting screw is provided with a base, wherein the base and the lifting gear can be fixedly connected by bolts, or other fixed installation methods can be adopted.

[0016] The manual lifting mechanism includes a manual gear 10, a manual rotating sleeve 11 fixedly connected to the top of the manual gear, a screw sleeve 15 whose bottom passes through the center hole of the manual gear and is fixedly connected to the bottom of the box, a spring 14 sleeved on the bottom of the screw sleeve and extending into the center hole of the manual gear, and a fine-pitch nut 12 sleeved on the top of the screw sleeve. The manual rotating sleeve and the manual gear can be fixedly connected by bolts or by other methods. A first guide rod 13 is provided in the screw sleeve. When the automatic lifting method is adopted, the first guide rod reciprocates in the screw sleeve with the lifting and lowering of the load mounting plate, playing a guiding and supporting role. And through the cooperation of the fine-pitch thread and the screw sleeve thread, the manual gear can be self-locked at any position, which can not only ensure that the manual gear and the active gear can be reliably matched during the manual lifting process, but also facilitate the adjustment of the upper and lower positions of the manual rotating sleeve during the automatic lifting process to avoid obstacles.

[0017] The load mounting plate is fixedly mounted on the tops of the plurality of support columns and the first guide rod, so that the lifting of the support columns drives the lifting of the load mounting plate.

[0018] Furthermore, an outer sleeve 8 is mounted on the bottom of the support column, and a bearing is installed between the outer sleeve and the box body, which can protect the internal nut sleeve and ensure the operating stability of the support column.

[0019] Furthermore, a micro lifting device also includes a guide mechanism, which includes a guide sleeve 17 fixedly connected to the box body and a second guide rod 16 whose bottom is located inside the guide sleeve and is fixedly connected to the load mounting plate at the top, so that the operation of the overall structure is more stable and smooth.

[0020] Optimally, there are two lifting gears, which are spaced apart from the manual gear and the guide sleeve relative to the driving gear, ensuring the smooth operation of the overall structure and the balance of the load mounting plate during the lifting process.

[0021] The present invention protects a micro-lifting device, in which the driving gear and the lifting gear are always in meshing state. During normal operation, the manual gear of the manual lifting mechanism is in a separated state from the driving gear, and the driving motor rotates, driving the driving gear located below the driving motor to rotate, thereby driving the driven gear and the lifting screw connected thereto to rotate, so that the nut sleeve sleeved on the outside of the lifting screw drives the support column to move up and down, thereby driving the load mounting plate to rise and fall, and realizing the automatic lifting function. During the lifting and falling process of the load mounting plate, since the manual gear of the manual lifting mechanism is in a separated state from the driving gear, other parts of the manual lifting mechanism do not move, and only the first guide rod reciprocates in the screw sleeve as the load mounting plate rises and falls, playing an auxiliary guiding and supporting role.

[0022] When the automatic transmission or automatic lifting device fails or the power is off, rotate the fine-pitch nut to make it move along the screw sleeve, so that the manual rotating sleeve and the manual gear move downward, and the spring is in a compressed state until the manual gear is engaged with the driving gear. Then rotate the manual rotating sleeve to make the manual gear drive the driving gear to rotate, and the driving gear drives the lifting gear to rotate, repeating the automatic lifting action to achieve the lifting and lowering of the load mounting plate. The cooperation of the fine-pitch thread and the screw sleeve thread can realize the self-locking of the manual gear at any position, which can not only ensure the reliable cooperation between the manual gear and the driving gear during the manual lifting process, but also facilitate the adjustment of the upper and lower positions of the manual rotating sleeve during the automatic lifting process to avoid obstacles.

[0023] In summary, the micro lifting device protected by the present invention can realize both automatic lifting and manual lifting. It can not only realize load lifting in the case of power failure but also self-lock at any position.

[0024] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A micro lifting device, characterized in that: It includes a box body, an automatic lifting mechanism, a manual lifting mechanism and a load mounting plate, the automatic lifting mechanism includes an automatic transmission device, a driving motor and an automatic lifting device, the automatic transmission device includes a driving gear located at the bottom of the box body and a plurality of lifting gears meshing with the driving gear, the driving motor is fixedly installed in the box body to drive the driving gear to rotate, the automatic lifting device includes a lifting screw base fixedly connected to the bottom of the lifting gear, a lifting screw passing through the center hole of the lifting gear, a nut sleeve mounted on the lifting screw and a support column fixedly connected to the top of the nut sleeve, the lifting gear rotates to drive the lifting screw to rotate, the support column is a hollow structure, the lifting screw passes through the bottom of the support column and is located in the hollow structure, the manual lifting mechanism includes a manual gear, a manual rotating sleeve fixedly connected to the top of the manual gear, a bottom A screw sleeve that passes through the center hole of the manual gear and is fixedly connected to the bottom of the box body, a spring that is sleeved on the bottom of the screw sleeve and extends into the center hole of the manual gear, and a fine-pitch nut that is sleeved on the top of the screw sleeve, a first guide rod is provided in the screw sleeve, and the load mounting plate is fixedly mounted on the top of multiple support columns and the first guide rod. During normal operation, the manual gear and the driving gear of the manual lifting mechanism are in a separated state. When the automatic transmission or automatic lifting device fails or the power is cut off, the fine-pitch nut is rotated to make it move downward along the screw sleeve, so that the manual rotating sleeve moves downward together with the manual gear, and the spring is in a compressed state until the manual gear is meshed with the driving gear, and then the manual rotating sleeve is rotated to make the manual gear drive the driving gear to rotate, and the driving gear then drives the lifting gear to rotate, and the automatic lifting action is repeated to realize the lifting and lowering of the load mounting plate.

2. A micro lifting device according to claim 1, characterized in that: The bottom of the support column is sleeved with an outer shaft sleeve.

3. A micro lifting device according to claim 1, characterized in that: The invention also comprises a guide mechanism, wherein the guide mechanism comprises a guide sleeve fixedly connected to the box body and a second guide rod with a bottom located inside the guide sleeve and a top fixedly connected to the load mounting plate.

4. A micro-lifting device according to claim 3, characterized in that: There are two lifting gears, which are spaced apart from the manual gear and the guide sleeve relative to the driving gear.

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