CN215592518U

CN215592518U - Large-load linear jacking mechanism

Info

Publication number: CN215592518U
Application number: CN202121955373.6U
Authority: CN
Inventors: 王明春; 陈天池; 叶磊
Original assignee: Suzhou Mingchi Precision Technology Co ltd
Current assignee: Suzhou Mingchi Precision Technology Co ltd
Priority date: 2021-08-19
Filing date: 2021-08-19
Publication date: 2022-01-21
Anticipated expiration: 2031-08-19

Abstract

The utility model discloses a heavy-load linear jacking mechanism, which comprises a screw rod transmission assembly, wherein an installation seat is arranged above the screw rod transmission assembly, a large gear is arranged at the top of the installation seat, a small gear is arranged between the large gears, a driving unit is arranged on one side of the screw rod transmission assembly, a tray is arranged above the installation seat, a proximity sensor is arranged at the upper end of the installation seat, the driving unit consists of a motor, a reducer, a brake and an encoder, the brake is arranged at the rear end of the motor, the encoder is arranged at the bottom of the driving unit, the brake is arranged at the upper end of the encoder, and the reducer is connected below the installation seat. The lead screw can be prevented from being separated from the nut due to overshoot during movement.

Description

Large-load linear jacking mechanism

Technical Field

The utility model relates to the field of linear jacking, in particular to a large-load linear jacking mechanism.

Background

At the present stage, with the scientific and technical level at home and abroad changing day by day, more and more enterprises gradually turn to intelligent factories with automatic and unmanned signs. In an intelligent factory, a mobile robot called an automatic guided transport vehicle plays the role of a 'carrier' instead of manpower in an actual factory, so that not only are workers liberated from daily monotonous and often dangerous work tasks, the work error rate is reduced, the personal safety is guaranteed, but also the work efficiency and the actual output of the factory can be greatly improved.

Generally, according to actual production requirements, the structural forms of the automated guided vehicle are generally divided into three types, namely a "piggyback type", a "traction type", and a "carrier platform type". The backpack mobile robot has the advantages of strong load capacity, high safety, good adaptability to the channel and the like, so the backpack mobile robot is used in many cases. For the backpack mobile robot, full backpack automatic carrying of articles is realized mainly by integrating a load jacking mechanism.

Common load jacking mechanisms include an X-shaped cross rod mechanism, an electric push rod mechanism, a special trapezoidal screw rod jacking mechanism and the like. The X-shaped cross rod mechanism and the electric push rod mechanism have simple mechanical structures, but relatively poor bearing capacity and bearing stability; the special trapezoidal screw jacking mechanism occupies a large volume space, is low in transmission efficiency, and the large-diameter trapezoidal screw nut has strict processing requirements and high cost, so that the large-load linear jacking mechanism is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects in the prior art and provides a heavy-load linear jacking mechanism.

In order to achieve the purpose, the utility model adopts the following technical scheme: the utility model provides a linear climbing mechanism of heavy load, includes screw drive assembly, screw drive assembly's top is provided with the mount pad, the gear wheel is installed at the top of mount pad, install the pinion between the gear wheel, one side of screw drive assembly is provided with drive unit, the top of mount pad is provided with the tray, proximity sensor is installed to the upper end of mount pad, drive unit is by the motor, the reduction gear, and stopper and encoder are constituteed, the rear end at the motor is installed to the stopper, the bottom at drive unit is installed to the encoder, the upper end at the encoder is installed to the stopper, retarder connection is in the below of mount pad.

As a further description of the above technical solution:

the lead screw drive assembly is by the lead screw, the nut, gear connecting piece, the base down, the fixing base, and support bearing, seal assembly and adjusting shim constitute, lead screw drive assembly's quantity is three, and is equilateral triangle distribution in the upper end of mount pad and through the fix with screw, the top of lead screw is provided with lock nut, the bottom of lead screw is provided with the separation blade.

As a further description of the above technical solution:

the top of the screw rod is fixedly connected with the tray through a locking nut, and the bottom of the screw rod is fixedly connected with the blocking piece through a screw.

As a further description of the above technical solution:

the supporting bearing comprises a large conical roller bearing and a small conical roller bearing, an inner hole of the large conical roller bearing is sleeved on a positioning cylindrical surface of the gear connecting piece, an outer cylindrical surface is connected with the fixed seat in a matched mode, an inner hole of the small conical roller bearing is sleeved on a lower end cylindrical surface of the nut, an outer cylindrical surface is connected with an inner hole of the lower base in a matched mode, and the lower base is fixedly connected with the fixed seat through a screw.

As a further description of the above technical solution:

the nut is axially limited by the large conical roller bearing and the small conical roller bearing, only circumferential rotation can be generated, the three groups of screw rods are fixed with the tray, so that the circumferential rotation is limited, only movement in the vertical direction can be generated, and the screw rods can generate linear displacement in the vertical direction due to the rotary motion of the nut.

As a further description of the above technical solution:

the sealing assembly is composed of a felt oil seal and a lip-shaped sealing ring, the felt oil seal is arranged on the uppermost portion of the screw rod transmission assembly and is embedded in an inner groove of the fixed seat, the lip-shaped sealing ring is arranged on the lowermost portion of the screw rod transmission assembly and is embedded in an inner hole of the lower base, the lip edge of the lip edge is in contact with a cylindrical surface at the lower end of the nut, and the adjusting gasket is arranged between the lower base and the fixed seat and is used for adjusting the pre-tightening force of the supporting bearing.

As a further description of the above technical solution:

the bull gear passes through the little tip fixed connection of the gear connecting piece among screw and the lead screw drive assembly, the pinion setting is put and simultaneously with three big gear engagement at the central point of the equilateral triangle that three group's bull gear centre of a circle formed, through screw and drive unit's output shaft fixed connection, the rotation of pinion will drive the synchronous rotation of three group's bull gears simultaneously.

As a further description of the above technical solution:

the motor outputs motion and power, appropriate rotating speed and torque are obtained through the speed reducer to drive the gear transmission mechanism, the rotating speed and the rotating angle of the motor can be controlled in real time through the encoder, and the proximity sensor is fixedly connected to the mounting seat.

The utility model has the following beneficial effects:

in the utility model, three groups of screw rods are fixed with the tray, so that circumferential rotation is limited, and only movement in the vertical direction can be generated, the screw rods can generate linear displacement in the vertical direction due to the rotation movement of the nuts, the bottom of the screw rods is fixedly connected with the baffle plate through screws, the screw rods can be prevented from being separated from the nuts due to overshoot during movement, the felt oil seal is arranged at the uppermost part of the screw rod transmission assembly and is embedded in the inner groove of the fixing seat, so that solid particles such as external dust can be effectively prevented from entering, the adjusting gasket is arranged between the lower base and the fixing seat and is used for adjusting the pre-tightening force of the supporting bearing, the bearing rigidity of the screw rod transmission assembly is ensured and improved, and the occurrence of the situation that a jacking object descends rapidly due to abnormal power failure of the jacking mechanism can be prevented by arranging the brake, so that the safety of mechanism movement is ensured.

Drawings

Fig. 1 is a schematic overall structure diagram of a heavy-load linear jacking mechanism according to the present invention;

fig. 2 is a schematic structural diagram of a screw rod transmission assembly of a heavy-load linear jacking mechanism provided by the utility model;

fig. 3 is a cross-sectional view of a heavy-load linear jacking mechanism according to the present invention;

fig. 4 is a schematic diagram of a heavy-load linear jacking mechanism according to the present invention with a tray removed.

Illustration of the drawings:

1. the screw rod transmission assembly; 2. a bull gear; 3. a pinion gear; 4. a drive unit; 5. a mounting seat; 6. a tray; 7. a proximity sensor; 11. a screw rod; 12. a nut; 13. a gear connection; 14. a lower base; 15. a fixed seat; 16. a support bearing; 17. a seal assembly; 18. adjusting the gasket; 161. a large tapered roller bearing; 162. a small tapered roller bearing; 171. felt oil seal; 172. a lip-shaped seal ring; 111. locking the nut; 112. a baffle plate; 41. a motor; 42. a speed reducer; 43. a brake; 44. an encoder.

Detailed Description

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

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "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; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-4, one embodiment of the present invention is provided: the utility model provides a linear climbing mechanism of heavy load, includes screw drive assembly 1, the top of screw drive assembly 1 is provided with mount pad 5, gear wheel 2 is installed at the top of mount pad 5, install pinion 3 between gear wheel 2, one side of screw drive assembly 1 is provided with drive unit 4, the top of mount pad 5 is provided with tray 6, proximity sensor 7 is installed to the upper end of mount pad 5, drive unit 4 is by motor 41, reduction gear 42, and stopper 43 and encoder 44 constitute, the rear end at motor 41 is installed to stopper 43, the bottom at drive unit 4 is installed to encoder 44, the upper end at encoder 44 is installed to stopper 43, reduction gear 42 connects the below at mount pad 5.

In the utility model, the screw rod transmission assembly 1 is composed of three screw rods 11, nuts 12, a gear connecting piece 13, a lower base 14, a fixed seat 15, a support bearing 16, a sealing assembly 17 and an adjusting gasket 18, the screw rod transmission assemblies 1 are distributed at the upper end of the mounting seat 5 in an equilateral triangle and are fixed through screws, the top of each screw rod 11 is provided with a locking nut 111, the bottom of each screw rod 11 is provided with a baffle 112, and the screw rod transmission assemblies 1 adopt ball screw nuts with high efficiency and high precision for transmission.

The top of the screw rod 11 is fixedly connected with the tray 6 through a locking nut 111, and the bottom of the screw rod 11 is fixedly connected with a baffle 112 through a screw, so that the screw rod 11 can be prevented from being separated from the nut 12 due to overshoot during movement.

The support bearing 16 comprises a large conical roller bearing 161 and a small conical roller bearing 162, an inner hole of the large conical roller bearing 161 is sleeved on a positioning cylindrical surface of the gear connecting piece 13, an outer cylindrical surface is connected with the fixed seat 15 in a matched mode, an inner hole of the small conical roller bearing 162 is sleeved on a lower end cylindrical surface of the nut 12, the outer cylindrical surface is connected with an inner hole of the lower base 14 in a matched mode, and the lower base 14 is fixedly connected with the fixed seat 15 through screws.

The nut 12 is axially limited by the large conical roller bearing 161 and the small conical roller bearing 162, and only circumferential rotation can be generated, and three groups of the screw rods 11 are all fixed with the tray 6, so that the circumferential rotation is limited, only movement in the vertical direction can be generated, and the screw rods 11 can generate linear displacement in the vertical direction due to the rotation of the nut 12.

The seal assembly 17 is composed of a felt oil seal 171 and a lip-shaped seal ring 172, the felt oil seal 171 is arranged on the uppermost portion of the screw rod transmission assembly 1 and is embedded in an inner groove of the fixed seat 15, so that solid particles such as external dust can be effectively prevented from entering, the lip-shaped seal ring 172 is arranged on the lowermost portion of the screw rod transmission assembly 1 and is embedded in an inner hole of the lower base 14, the lip edge of the lip edge is in contact with a lower end cylindrical surface of the nut 12, so that the phenomenon that lubricant added due to bearing lubrication needs to be provided is leaked out to achieve the effect of pushing sealing is avoided, and the adjusting gasket 18 is arranged between the lower base 14 and the fixed seat 15 and used for adjusting the pre-tightening force of the support bearing 16, and the bearing rigidity of the screw rod transmission assembly 1 is guaranteed and improved.

Gear wheel 2 passes through the little tip fixed connection of the gear connecting piece 13 in screw and the screw drive subassembly 1, pinion 3 sets up at the central point of the equilateral triangle that 2 centre of a circle of three big gear wheels formed and puts and simultaneously with three big gear wheel 2 meshing, through the output shaft fixed connection of screw and drive unit 4, the synchronous rotation of three big gear wheel 2 of group will be driven simultaneously in the rotation of pinion 3, through setting up stopper 43, can prevent that climbing mechanism from leading to the emergence of the condition that the jacking object descends rapidly because of unusual outage, has guaranteed the security of mechanism's motion.

The motor 41 outputs motion and power, appropriate rotating speed and torque are obtained through the reducer 42 to drive the gear transmission mechanism, the rotating speed and the rotating angle of the motor 41 can be controlled in real time through the encoder 44, the proximity sensor 7 is fixedly connected to the mounting base 5, when the jacking mechanism performs action to enable the lower surface of the tray 6 to be close to the trigger point of the proximity sensor 7, an electrical trigger signal is generated, and the jacking mechanism takes the position of the mechanism when the proximity sensor 7 triggers as a reference origin.

The working principle and the using process thereof are as follows: the driving unit outputs motion and power to drive the pinions on the output shaft of the driving unit to rotate, the pinions simultaneously drive the three groups of large gears to synchronously rotate, and the rotation of the large gears further drives the nuts to circumferentially rotate. Because the nut axial fixity and lead screw circumference in the screw drive assembly are spacing by the tray, and then make the ball screw on three corner position make synchronous linear motion on the vertical direction, realize the jacking motion of tray.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.

Claims

1. The utility model provides a linear climbing mechanism of heavy load, includes screw drive assembly (1), its characterized in that: a mounting seat (5) is arranged above the screw rod transmission assembly (1), a large gear (2) is arranged at the top of the mounting seat (5), a pinion (3) is arranged between the big gears (2), a driving unit (4) is arranged at one side of the screw rod transmission component (1), a tray (6) is arranged above the mounting seat (5), a proximity sensor (7) is arranged at the upper end of the mounting seat (5), the driving unit (4) consists of a motor (41), a speed reducer (42), a brake (43) and an encoder (44), the brake (43) is arranged at the rear end of the motor (41), the encoder (44) is arranged at the bottom of the driving unit (4), the brake (43) is arranged at the upper end of the encoder (44), and the speed reducer (42) is connected below the mounting seat (5).

2. The heavy-load linear jacking mechanism according to claim 1, wherein: screw drive subassembly (1) comprises lead screw (11), nut (12), gear connecting piece (13), lower base (14), fixing base (15), support bearing (16), seal assembly (17) and adjusting shim (18), the quantity of screw drive subassembly (1) is three, and is equilateral triangle distribution in the upper end of mount pad (5) and through the fix with screw, the top of lead screw (11) is provided with lock nut (111), the bottom of lead screw (11) is provided with separation blade (112).

3. The heavy-load linear jacking mechanism according to claim 2, wherein: the top of the screw rod (11) is fixedly connected with the tray (6) through a locking nut (111), and the bottom of the screw rod (11) is fixedly connected with a blocking piece (112) through a screw.

4. The heavy-load linear jacking mechanism according to claim 2, wherein: the supporting bearing (16) comprises a large tapered roller bearing (161) and a small tapered roller bearing (162), an inner hole of the large tapered roller bearing (161) is sleeved on a positioning cylindrical surface of the gear connecting piece (13), an outer cylindrical surface is connected with the fixing seat (15) in a matching mode, an inner hole of the small tapered roller bearing (162) is sleeved on a lower end cylindrical surface of the nut (12), the outer cylindrical surface is connected with an inner hole of the lower base (14) in a matching mode, and the lower base (14) is fixedly connected with the fixing seat (15) through screws.

5. The heavy-load linear jacking mechanism according to claim 2, wherein: the nut (12) is limited axially by the large conical roller bearing (161) and the small conical roller bearing (162) and can only rotate circumferentially, three groups of screw rods (11) are fixed with the tray (6), so that the circumferential rotation is limited and only movement in the vertical direction can be generated, and the screw rods (11) can generate linear displacement in the vertical direction due to the rotation of the nut (12).

6. The heavy-load linear jacking mechanism according to claim 2, wherein: the sealing assembly (17) is composed of a felt oil seal (171) and a lip-shaped sealing ring (172), the felt oil seal (171) is arranged on the uppermost portion of the screw rod transmission assembly (1) and embedded in an inner groove of the fixed seat (15), the lip-shaped sealing ring (172) is arranged on the lowermost portion of the screw rod transmission assembly (1) and embedded in an inner hole of the lower base (14), the lip edge of the lip edge is in contact with the lower end cylindrical surface of the nut (12), and the adjusting gasket (18) is arranged between the lower base (14) and the fixed seat (15) and used for adjusting the pre-tightening force of the supporting bearing (16).

7. The heavy-load linear jacking mechanism according to claim 1, wherein: the utility model discloses a lead screw drive assembly, including screw, screw rod transmission assembly (1), gear wheel (2) are through the little tip fixed connection of gear connecting piece (13) in screw and the lead screw transmission subassembly (1), pinion (3) set up at the central point of the equilateral triangle that three group gear wheel (2) centre of a circle formed put and mesh with three group gear wheel (2) simultaneously, through the output shaft fixed connection of screw and drive unit (4), the rotation of pinion (3) will drive the synchronous rotation of three group gear wheel (2) simultaneously.

8. The heavy-load linear jacking mechanism according to claim 1, wherein: the motor (41) outputs motion and power, appropriate rotating speed and torque are obtained through the reducer (42) to drive the gear transmission mechanism, the rotating speed and the rotating angle of the motor (41) can be controlled in real time through the encoder (44), and the proximity sensor (7) is fixedly connected to the mounting base (5).