Dual lifting device

Abstract

The utility model belongs to the technical field of lifting equipment, and discloses a double-lifting device which comprises a frame assembly, a first lifting assembly, a second lifting assembly and a bearing platform, the frame assembly comprises a frame bottom plate, a frame middle plate and a plurality of supporting rods used for connecting the frame bottom plate and the frame middle plate, the first lifting assembly comprises a servo motor, a lead screw lifter and a lifting support, the lifting support is connected with the lead screw lifter, the servo motor is connected with the lead screw lifter, the second lifting assembly comprises a lifting air cylinder, a first lifting plate and a second lifting plate, the first lifting plate and the lifting support form a mounting space, and the lifting air cylinder is connected into the mounting space. And the bearing platform is connected to the second lifting plate. When the bearing table ascends and descends, rapid ascending and descending are completed through the ascending and descending air cylinder, the ascending and descending precision is guaranteed through the lead screw ascending and descending machine driven by the servo motor, and therefore the ascending and descending speed and the ascending and descending precision are both achieved, and high universality is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to hoisting equipment technical field especially relates to a double lifting device. BACKGROUND

[0002] The lifting device is a kind of device for moving along the height direction of the conveying object, which is widely used in different industries such as industry and construction, wherein the driving system for realizing lifting function is different, and the types of lifting device are also different. At present, the lifting device includes a driving system for realizing lifting function by using lead screw transmission or a driving system for realizing lifting function by using lifting cylinder.

[0003] However, regardless of which driving system is used to realize the lifting function, it has certain defects. For example, the lifting device using lead screw transmission to realize the lifting function has high positioning accuracy, but its movement speed is slow. The lifting device using lifting cylinder to realize the lifting function has fast response speed, but its positioning accuracy is poor. Therefore, the lifting device with only single driving system can only adapt to the use conditions with their respective advantages, and has poor versatility. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a double lifting device, which has high versatility, high positioning accuracy and fast response speed.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A double lifting device is provided, which comprises:

[0007] A frame assembly comprises a frame bottom plate, a frame middle plate and a plurality of support rods, the plurality of support rods are connected between the frame bottom plate and the frame middle plate, and the frame middle plate is provided with a relief through hole;

[0008] A first lifting assembly comprises a servo motor, a lead screw lifter and a lifting support, the lead screw lifter is connected to the frame bottom plate, the lifting support is connected to the lead screw lifter and located in the relief through hole, the servo motor is connected to the lead screw lifter, and the servo motor is used to provide driving force for the lead screw lifter to drive the lifting support;

[0009] A second lifting assembly comprises a lifting cylinder, a first lifting plate and a second lifting plate, the first lifting plate is connected to one side of the lifting support away from the screw lifter to form a mounting space, a through hole is formed in the first lifting plate and communicates with the mounting space, the lifting cylinder is connected in the mounting space, and an output end of the lifting cylinder is connected with the second lifting plate through the through hole;

[0010] A bearing table is connected to the second lifting plate to bear the workpiece.

[0011] Optionally, the first lifting assembly further comprises a plurality of first guide columns and a plurality of first guide sleeves corresponding to the first guide columns, the first guide sleeves are connected to the middle frame plate, one end of the first guide column is slidably connected to the bottom frame plate, and the other end of the first guide column is slidably inserted into the corresponding first guide sleeve.

[0012] Optionally, a receiving groove corresponding to the first guide column is formed in the bottom frame plate, and the first guide column is slidably inserted into the receiving groove.

[0013] Optionally, the first lifting assembly further comprises a linear bearing, the linear bearing is arranged in the first guide sleeve and sleeved on the first guide column.

[0014] Optionally, the second lifting assembly further comprises a plurality of second guide columns and a plurality of second guide sleeves corresponding to the second guide columns, the second guide sleeves are connected to the first lifting plate and located in the avoiding through hole, one end of the second guide column is connected to the second lifting plate, and the other end of the second guide column is slidably inserted into the corresponding second guide sleeve.

[0015] Optionally, the second lifting assembly further comprises a linear bearing, the linear bearing is arranged in the second guide sleeve and sleeved on the second guide column.

[0016] Optionally, the second lifting assembly further comprises a plurality of protective side plates, the plurality of protective side plates are connected to the first lifting plate to form a protective space, and the second lifting plate is arranged in the protective space and can be lifted.

[0017] Optionally, the protective side plate comprises a first baffle, a second baffle and a third baffle, the first baffle is connected to the first lifting plate vertically, the second baffle is connected to one side of the first baffle away from the first lifting plate, and the first baffle is connected with the third baffle on both sides along the length direction.

[0018] Optionally, the second lifting assembly further comprises a reinforcing plate corresponding to the protective side plate, the reinforcing plate is arranged on the outer side of the protective side plate away from the protection space and connected with the first lifting plate.

[0019] Optionally, a limiting groove is arranged on the second lifting plate, and the bearing table is connected in the limiting groove.

[0020] The utility model discloses the beneficial effects of:

[0021] The utility model provides a double lifting device, which comprises a first lifting assembly comprising a screw lifting machine driven by a servo motor to realize the lifting of a lifting support, and a second lifting assembly comprising a lifting cylinder to realize the lifting of a second lifting plate, wherein the lifting cylinder is arranged in an installation space formed by the lifting support and the first lifting plate, so that when the bearing table is lifted, the lifting cylinder is used to complete rapid lifting, the screw lifting machine driven by the servo motor is used to ensure the lifting precision, and the lifting speed and the lifting precision are combined during the lifting of the bearing table, thereby improving the versatility of the lifting device with only a single driving system, and even when one of the first lifting assembly or the second lifting assembly fails, the other can still complete the lifting operation, thereby improving the reliability. BRIEF DESCRIPTION OF DRAWINGS

[0022] Fig. 1 is the structure assembly drawing of the double lifting device in the first perspective provided by the utility model;

[0023] Fig. 2 is the structure assembly drawing of the double lifting device in the second perspective provided by the utility model.

[0024] In the drawings:

[0025] 1, frame assembly; 11, frame bottom plate; 12, frame middle plate; 13, support rod;

[0026] 2, first lifting assembly; 21, screw lifting machine; 22, lifting support; 23, first guide column; 24, first guide sleeve;

[0027] 3, second lifting assembly; 31, lifting cylinder; 32, first lifting plate; 33, second lifting plate; 331, limiting groove; 34, second guide column; 35, second guide sleeve; 36, protective side plate; 361, first baffle; 362, second baffle; 363, third baffle; 37, reinforcing plate;

[0028] 4, bearing table. DETAILED DESCRIPTION

[0029] The utility model will be described in further detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are merely intended to explain the utility model and not to limit the utility model. In addition, it should be noted that only the parts related to the utility model are shown in the drawings for ease of description, not all the structures.

[0030] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0031] In the utility model, unless otherwise explicitly specified and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0032] In the description of the embodiment, the terms "up", "down", "right", etc. orientation or position relationship is based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in description, and have no special meaning.

[0033] The lifting device is a device for moving the to-be-transported object along the height direction, which is widely used in different industries such as industry and building, wherein the driving system for realizing the lifting function is different, and the types of lifting devices are also different. At present, the lifting device includes a driving system for realizing the lifting function by using a lead screw or a driving system for realizing the lifting function by using a lifting cylinder.

[0034] But whichever drive system is used to achieve the lifting function has certain defects, for example, only the use of screw drive to achieve the lifting function of lifting device, although it has high positioning accuracy, but its speed is slow, and the use of lifting cylinder to achieve the lifting function of lifting device has faster response speed, but its positioning accuracy is poor, thus leading to only a single drive system lifting device can only adapt to their own advantages of use in working conditions, poor versatility.

[0035] Therefore, in order to improve the versatility of the lifting device, make the lifting device has high positioning accuracy and fast response speed, the embodiment provides a double lifting device.

[0036] As shown in Figs. 1-2 The double lifting device includes a frame assembly 1, a first lifting assembly 2, a second lifting assembly 3 and a carrying table 4, the frame assembly 1 includes a frame bottom plate 11, a frame middle plate 12 and a plurality of support rods 13, the plurality of support rods 13 are connected between the frame bottom plate 11 and the frame middle plate 12, the frame middle plate 12 is provided with a avoiding through hole, the first lifting assembly 2 includes a servo motor, a screw lifting machine 21 and a lifting bracket 22, the screw lifting machine 21 is connected to the frame bottom plate 11, the lifting bracket 22 is connected with the screw lifting machine 21 and located in the avoiding through hole, the servo motor is connected with the screw lifting machine 21, the servo motor is used to provide driving force for the screw lifting machine 21 to drive the lifting bracket 22, the second lifting assembly 3 includes a lifting cylinder 31, a first lifting plate 32 and a second lifting plate 33, the first lifting plate 32 is connected to one side of the lifting bracket 22 away from the screw lifting machine 21 to form an installation space, the first lifting plate 32 is provided with a through hole communicating with the installation space, the lifting cylinder 31 is connected in the installation space, the output end of the lifting cylinder 31 passes through the through hole and is connected with the second lifting plate 33, the carrying table 4 is connected to the second lifting plate 33 to carry the workpiece.

[0037] The double lifting device is provided with the first lifting assembly 2 which realizes the lifting of the lifting support 22 by the screw lifting machine 21 driven by the servo motor, the second lifting assembly 3 which realizes the lifting of the second lifting plate 33 by the lifting cylinder 31, and the lifting cylinder 31 is arranged in the mounting space formed by the lifting support 22 and the first lifting plate 32, so that when the lifting of the bearing table 4 is realized, the lifting cylinder 31 is used to complete the rapid lifting, and the screw lifting machine 21 driven by the servo motor is used to ensure the lifting precision, so that the lifting speed and the lifting precision are combined in the process of realizing the lifting of the bearing table 4, so that the lifting device has stronger universality than the lifting device with only a single driving system, and even when one of the first lifting assembly 2 or the second lifting assembly 3 fails, the other can still complete the lifting operation, so that the reliability is higher. In the embodiment, the servo motor and the screw lifting machine 21 are prior art, and thus will not be described in detail, wherein the servo motor is not shown in the figure.

[0038] In the embodiment, four support rods 13 are arranged between the frame bottom plate 11 and the frame middle plate 12, and are respectively located at four corners of the frame bottom plate 11 and the frame middle plate 12.

[0039] Optionally, as shown in Figs. 1-2 the first lifting assembly 2 further includes a plurality of first guide columns 23 and a plurality of first guide sleeves 24 corresponding to the plurality of first guide columns 23, the first guide sleeves 24 are connected to the frame middle plate 12, one end of the first guide column 23 is slidably connected to the frame bottom plate 11, and the other end of the first guide column 23 is slidably inserted into the corresponding first guide sleeve 24. By arranging the first guide column 23 and the first guide sleeve 24, the movement track of the lifting support 22 can be guided and limited when the lifting support 22 is lifted by the screw lifting machine 21 driven by the servo motor, so as to avoid deviation of the lifting track due to lateral shaking. Through the cooperation of the first guide column 23 and the first guide sleeve 24, the influence of various lateral forces is avoided during the lifting process, and the stability of the equipment during the lifting process is enhanced. In the embodiment, the first lifting assembly 2 includes four first guide columns 23 and four first guide sleeves 24.

[0040] Optionally, as shown in Figs. 1-2 the frame bottom plate 11 is provided with a receiving groove corresponding to the first guide column 23, and the first guide column 23 is slidably inserted into the receiving groove. By arranging the receiving groove corresponding to the first guide column 23 on the frame bottom plate 11, the sliding connection between the frame bottom plate 11 and the first guide column 23 is realized.

[0041] Optionally, the first lifting assembly 2 further comprises a linear bearing, which is arranged in the first guide sleeve 24 and sleeved on the first guide column 23. By arranging the linear bearing in the first guide sleeve 24, the frictional resistance of the first guide column 23 sliding in the first guide sleeve 24 is reduced, so that the first guide column 23 slides more smoothly in the first guide sleeve 24.

[0042] Optionally, as shown in Figs. 1-2 the second lifting assembly 3 further comprises a plurality of second guide columns 34 and a plurality of second guide sleeves 35 corresponding to the plurality of second guide columns 34, the second guide sleeves 35 are connected to the first lifting plate 32 and located in the avoiding through hole, one end of the second guide column 34 is connected to the second lifting plate 33, and the other end of the second guide column 34 is slidably inserted into the corresponding second guide sleeve 35. By arranging the second guide column 34 and the second guide sleeve 35, the movement track of the second lifting plate 33 can be guided and limited when the lifting cylinder 31 drives the second lifting plate 33 to lift, so as to avoid deviation of the lifting track caused by lateral shaking. Through the cooperation of the second guide column 34 and the second guide sleeve 35, the influence of various lateral forces is avoided during lifting, and the stability of the equipment during lifting is enhanced. In this embodiment, the second lifting assembly 3 comprises four second guide columns 34 and four second guide sleeves 35.

[0043] Optionally, as shown in Figs. 1-2 the second lifting assembly 3 further comprises a linear bearing, which is arranged in the second guide sleeve 35 and sleeved on the second guide column 34. By arranging the linear bearing in the second guide sleeve 35, the frictional resistance of the second guide column 34 sliding in the second guide sleeve 35 is reduced, so that the second guide column 34 slides more smoothly in the second guide sleeve 35.

[0044] Optionally, as shown in Figs. 1-2 the second lifting assembly 3 further comprises a plurality of protective side plates 36, which are connected to the first lifting plate 32 to form a protective space, and the second lifting plate 33 is arranged in the protective space and can be lifted. By arranging the protective side plate 36 on the first lifting plate 32, when the lifting cylinder 31 drives the second lifting plate 33 to lift in the protective space, the piston rod of the lifting cylinder 31 is prevented from being polluted by external impurities, so that the external impurities are not brought into the interior when the lifting cylinder 31 resets, and the failure is avoided.

[0045] Optionally, the protective side plate 36 comprises a first baffle 361, a second baffle 362 and a third baffle 363, the first baffle 361 is vertically connected to the first lifting plate 32, the second baffle 362 is connected to a side of the first baffle 361 away from the first lifting plate 32, and the first baffle 361 is connected with the third baffle 363 on both sides in the length direction. By arranging the second baffle 362 on the side of the first baffle 361 away from the first lifting plate 32, in addition to the shielding function realized by the second baffle 362, the second lifting plate 33 can also be limited and protected from lifting, and the second lifting plate 33 can be prevented from being out of limit under the driving of the lifting cylinder 31 by the second baffle 362.

[0046] Optionally, as shown in Figs. 1-2 the second lifting assembly 3 further comprises a reinforcing plate 37, the reinforcing plate 37 corresponds to the protective side plate 36 one by one, the reinforcing plate 37 is arranged on the outer side of the protective side plate 36 away from the protection space and is connected with the first lifting plate 32. By arranging the reinforcing plate 37 on the outer side of the protective side plate 36 away from the protection space, the structural strength of the protective side plate 36 is increased. In the embodiment, the reinforcing plate 37 is a quenched plate.

[0047] Optionally, a limiting recess 331 is arranged on the second lifting plate 33, and the bearing table 4 is connected in the limiting recess 331. By arranging the limiting recess 331 on the second lifting plate 33 and connecting the bearing table 4 in the limiting recess 331, the positioning is facilitated when the bearing table 4 is assembled, and the accuracy of the position of the bearing table 4 during installation is ensured.

[0048] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be made without departing from the protection scope of the utility model. Here, it is unnecessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made in the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A dual lifting device, characterized in that, The dual lifting device includes: A frame assembly (1) includes a frame base plate (11), a frame middle plate (12) and a plurality of support rods (13). The plurality of support rods (13) are connected between the frame base plate (11) and the frame middle plate (12). The frame middle plate (12) has a clearance through hole. The first lifting assembly (2) includes a servo motor, a screw jack (21), and a lifting bracket (22). The screw jack (21) is connected to the frame base plate (11). The lifting bracket (22) is connected to the screw jack (21) and located in the clearance through hole. The servo motor is connected to the screw jack (21) and is used to provide the screw jack (21) with the driving force to drive the lifting bracket (22). The second lifting assembly (3) includes a lifting cylinder (31), a first lifting plate (32), and a second lifting plate (33). The first lifting plate (32) is connected to the side of the lifting bracket (22) away from the screw jack (21) to form an installation space. The first lifting plate (32) has a through hole communicating with the installation space. The lifting cylinder (31) is connected to the installation space. The output end of the lifting cylinder (31) passes through the through hole and is connected to the second lifting plate (33). The support platform (4) is connected to the second lifting plate (33) and is used to support the workpiece.

2. The dual lifting device according to claim 1, characterized in that, The first lifting assembly (2) further includes a plurality of first guide posts (23) and a first guide sleeve (24) corresponding to each of the plurality of first guide posts (23). The first guide sleeve (24) is connected to the middle plate (12) of the frame. One end of the first guide post (23) is slidably connected to the bottom plate (11) of the frame, and the other end of the first guide post (23) is slidably inserted into the corresponding first guide sleeve (24).

3. The dual lifting device according to claim 2, characterized in that, The frame base plate (11) has a receiving groove corresponding to the first guide post (23), and the first guide post (23) is slidably inserted into the receiving groove.

4. The dual lifting device according to claim 2, characterized in that, The first lifting assembly (2) also includes a linear bearing, which is disposed inside the first guide sleeve (24) and sleeved on the first guide post (23).

5. The dual lifting device according to claim 1, characterized in that, The second lifting assembly (3) further includes a plurality of second guide posts (34) and a second guide sleeve (35) corresponding to each of the plurality of second guide posts (34). The second guide sleeve (35) is connected to the first lifting plate (32) and located in the clearance through hole. One end of the second guide post (34) is connected to the second lifting plate (33), and the other end of the second guide post (34) is slidably inserted into the corresponding second guide sleeve (35).

6. The dual lifting device according to claim 5, characterized in that, The second lifting assembly (3) also includes a linear bearing, which is disposed inside the second guide sleeve (35) and sleeved on the second guide post (34).

7. The dual lifting device according to claim 1, characterized in that, The second lifting assembly (3) also includes a plurality of protective side plates (36), which are connected to the first lifting plate (32) to form a protective space. The second lifting plate (33) is provided in the protective space in a liftable manner.

8. The dual lifting device according to claim 7, characterized in that, The protective side plate (36) includes a first baffle (361), a second baffle (362) and a third baffle (363). The first baffle (361) is vertically connected to the first lifting plate (32). The second baffle (362) is connected to the side of the first baffle (361) away from the first lifting plate (32). The third baffle (363) is connected to both sides of the first baffle (361) along the length direction.

9. The dual lifting device according to claim 7, characterized in that, The second lifting assembly (3) also includes a reinforcing plate (37), which corresponds one-to-one with the protective side plate (36). The reinforcing plate (37) is located on the outside of the protective side plate (36) away from the protective space and is connected to the first lifting plate (32).

10. The dual lifting device according to claim 1, characterized in that, The second lifting plate (33) has a limiting groove (331) and the bearing platform (4) is connected to the limiting groove (331).

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