Electric push rod capable of being rapidly lifted

Abstract

The utility model discloses an electric push rod capable of lifting quickly, which comprises a base, a mounting seat is fixedly arranged at the upper end of the base, a driving cavity is arranged in the mounting seat, a first fixing rod is arranged on one side in the driving cavity, and the first fixing rod is rotatably connected with the inner wall of the driving cavity. A second fixing rod is arranged in the middle of the interior of the driving cavity, a third fixing rod is arranged on the other side of the interior of the driving cavity, a driving gear is fixedly arranged outside the first fixing rod, and a first connecting gear is fixedly arranged above the exterior of the second fixing rod; a second connecting gear is fixedly arranged on the lower portion of the exterior of the second fixing rod, a transmission gear is fixedly arranged on the exterior of the third fixing rod, and the transmission gear is in meshed connection with the second connecting gear, and the structure solves the problems that an electric push rod is not rapid enough to stretch out and draw back, and a driving structure of the electric push rod is prone to abrasion.

Description

Technical Field

[0001] The utility model relates to the technical field of electric push rods, in particular to an electric push rod that can be raised and lowered quickly. Background Art

[0002] An electric linear actuator, also known as a linear drive, is an electrically driven device that converts the rotational motion of an electric motor into linear reciprocating motion of a push rod. An electric linear actuator primarily consists of a drive motor, reduction gears, a screw and nut, a guide sleeve, a push rod, and a slide. In operation, the electric motor, after reducing speed via a gear or worm gear, drives a pair of screws and nuts. The screw and nut work together to convert the motor's rotational motion into linear motion of the push rod. The forward and reverse rotation of the motor allows the push rod to be extended and retracted. Rapid raising and lowering is a key feature of electric linear actuators.

[0003] For example, the Chinese patent "An Electric Push Rod" with announcement number CN211018529U includes a cylindrical casing, a push rod is inserted into the middle of the end face of the casing, the push rod is slidably connected to the casing, the side wall of the push rod is provided with a locking assembly for limiting the circumferential movement of the push rod, a transmission mechanism for promoting axial movement of the push rod is provided in the casing, the end face of the casing away from the protruding end of the push rod is provided with a prime mover connected to the transmission mechanism, the transmission mechanism includes a sleeve mounted on the outer wall of the push rod, the inner wall of the sleeve is provided with an internal thread, the outer wall of the push rod is provided with an external thread that meshes with the sleeve, the prime mover includes a motor fixed to the casing, the drive shaft of the motor is coaxially arranged with the push rod, and a coupling is provided between the sleeve and the drive shaft.

[0004] Although the above-mentioned existing technology can realize the extension and retraction of the electric push rod, in actual use, on the one hand, the electric push rod is not extended and retracted quickly enough. Usually, the electric push rod is driven by a motor and gears, and the gears drive the threaded rod to rotate and push the telescopic rod to move, which makes it difficult to increase the extension and retraction rate of the electric push rod, thereby affecting the user experience of the electric push rod. On the other hand, the driving structure of the electric push rod is prone to wear. When using the electric push rod, the gears and threaded rods are used. After long-term use, the gears wear out due to lack of lubrication, thereby shortening the service life of the electric push rod. Therefore, it does not meet the existing needs. In this regard, we propose an electric push rod that can be raised and lowered quickly. Utility Model Content

[0005] The purpose of the present invention is to provide an electric push rod that can be raised and lowered quickly, so as to solve the problems in the above background technology that the electric push rod cannot be extended and retracted quickly enough and the driving structure of the electric push rod is prone to wear.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an electric push rod that can be quickly raised and lowered, comprising a base, a mounting seat being fixedly provided on the upper end of the base, a driving cavity being provided inside the mounting seat, a first fixed rod being provided on one side of the driving cavity, the first fixed rod being rotatably connected to the inner wall of the driving cavity, a second fixed rod being provided at the middle position inside the driving cavity, the second fixed rod being rotatably connected to the inner wall of the driving cavity, a third fixed rod being provided on the other side of the driving cavity, the third fixed rod being rotatably connected to the inner wall of the driving cavity, a driving gear being fixedly provided on the outside of the first fixed rod, a first connecting gear being fixedly provided above the outside of the second fixed rod, the first connecting gear being meshed with the driving gear, a second connecting gear being fixedly provided below the outside of the second fixed rod, a transmission gear being fixedly provided on the outside of the third fixed rod, the transmission gear being meshed with the second connecting gear.

[0007] Preferably, a protective shell is fixedly provided on one side of the upper end of the mounting seat, a motor is fixedly provided inside the protective shell, and the output shaft of the motor extends into the driving cavity and is fixedly connected to the first fixing rod.

[0008] Preferably, an oil inlet pipe is fixedly provided on one side of the outside of the mounting seat, and an oil outlet pipe is fixedly provided on the other side of the outside of the mounting seat. Both the oil inlet pipe and the oil outlet pipe are connected to the driving cavity, and valves are fixedly provided on the outside of the oil inlet pipe and the oil outlet pipe.

[0009] Preferably, a sleeve is fixedly provided on the other side of the upper end of the mounting seat, a rotating rod is provided inside the sleeve, and the lower end of the rotating rod extends into the driving cavity and is fixedly connected to the third fixed rod.

[0010] Preferably, a telescopic rod is sleeved on the outside of the rotating rod, and the connection between the telescopic rod and the rotating rod is a threaded structure, and the upper end of the telescopic rod extends to the top of the sleeve.

[0011] Preferably, a rubber pad is provided on the outside of the rotating rod at the lower end of the sleeve, and the rubber pad is connected to the sleeve by glue.

[0012] Preferably, a sealing ring is fixedly provided on the upper end of the sleeve located outside the telescopic rod.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The utility model can increase the rotation speed of the rotating rod through the first connecting gear and the second connecting gear. When the electric push rod is used, the motor is turned on at this time, so that the output shaft of the motor drives the first fixed rod to rotate. At this time, the driving gear located outside the first fixed rod rotates together, and the first connecting gear is driven by the driving gear to rotate, and the number of teeth of the first connecting gear is less than that of the driving gear. The second fixed rod and the second connecting gear are driven by the first connecting gear to rotate together, and the number of teeth of the second connecting gear is less than that of the first connecting gear. At the same time, the transmission gear meshed with the second connecting gear rotates together, and the rotating rod is driven to rotate by the transmission gear, and the number of teeth of the transmission gear is less than that of the second connecting gear. The initial rotation speed of the driving gear is increased by the first connecting gear and the second connecting gear, so that the electric push rod can be raised and lowered quickly.

[0015] 2. The utility model can fill the lubricating oil into the driving chamber through the oil inlet pipe and the oil outlet pipe. After the electric push rod has been used for a period of time, the valve outside the oil outlet pipe is opened to discharge the lubricating oil inside the driving chamber until the old lubricating oil is discharged. At this time, the valve outside the oil outlet pipe is closed and the valve outside the oil inlet pipe is opened. New lubricating oil is poured into the driving chamber through the oil inlet pipe. At this time, the valve outside the oil inlet pipe is closed again to prevent the lubricating oil inside the driving chamber from overflowing. By replacing the lubricating oil, the gear operation inside the driving chamber remains stable and the friction between the gears is reduced, thereby improving the rotation rate of the rotating rod.

[0016] 3. The utility model can improve the sealing of the sleeve by providing a rubber pad. During the use of the electric push rod, the external thread of the rotating rod drives the telescopic rod to move into the inside of the sleeve until the telescopic rod moves to a suitable position. At this time, the lower end of the telescopic rod contacts and squeezes the rubber pad. The rubber pad can prevent the telescopic rod from rubbing against the inner wall of the sleeve during the contraction process, providing a certain degree of protection for the telescopic rod and the sleeve, thereby extending the service life of the electric push rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional diagram of the external structure of the utility model;

[0018] Figure 2 This is a front view of the internal structure of the utility model;

[0019] Figure 3 This is a side view of the internal structure of the utility model;

[0020] Figure 4 It is a partial enlarged view of the driving structure of the utility model.

[0021] In the figure: 1. Base; 2. Mounting seat; 3. Drive chamber; 4. Oil inlet pipe; 5. Oil outlet pipe; 6. Valve; 7. Protective shell; 8. Motor; 9. First fixing rod; 10. Second fixing rod; 11. Third fixing rod; 12. Drive gear; 13. First connecting gear; 14. Second connecting gear; 15. Transmission gear; 16. Sleeve; 17. Rotating rod; 18. Rubber pad; 19. Telescopic rod; 20. Sealing ring. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] See also Figure 1-4 , the utility model provides an embodiment: an electric push rod that can be quickly lifted and lowered, including a base 1, a mounting base 2 is fixedly provided on the upper end of the base 1, a driving chamber 3 is provided inside the mounting base 2, a first fixing rod 9 is provided on one side of the driving chamber 3, the first fixing rod 9 is rotatably connected to the inner wall of the driving chamber 3, a second fixing rod 10 is provided at the middle position inside the driving chamber 3, the second fixing rod 10 is rotatably connected to the inner wall of the driving chamber 3, a third fixing rod 11 is provided on the other side of the driving chamber 3, the third fixing rod 11 is rotatably connected to the inner wall of the driving chamber 3, a driving gear 12 is fixedly provided on the outside of the first fixing rod 9, a first connecting gear 13 is fixedly provided above the outside of the second fixing rod 10, the first connecting gear 13 is meshed with the driving gear 12, a second connecting gear 14 is fixedly provided below the outside of the second fixing rod 10, and a transmission gear 15 is fixedly provided on the outside of the third fixing rod 11, which is meshed with the second connecting gear 14.

[0024] During use, when the electric push rod is used, the motor 8 is turned on, so that the output shaft of the motor 8 drives the first fixed rod 9 to rotate. At this time, the driving gear 12 located outside the first fixed rod 9 rotates together, and the driving gear 12 drives the first connecting gear 13 meshed with it to rotate, and the number of teeth of the first connecting gear 13 is less than that of the driving gear 12. The second fixed rod 10 and the second connecting gear 14 are driven to rotate together through the first connecting gear 13, and the number of teeth of the second connecting gear 14 is less than that of the first connecting gear 13. At the same time, the transmission gear 15 meshed with the second connecting gear 14 rotates together, and the rotating rod 17 is rotated through the transmission gear 15, and the number of teeth of the transmission gear 15 is less than that of the second connecting gear 14.

[0025] See also Figure 1 and Figure 3A protective shell 7 is fixedly provided on one side of the upper end of the mounting base 2, and a motor 8 is fixedly provided inside the protective shell 7. The output shaft of the motor 8 extends into the driving cavity 3 and is fixedly connected to the first fixed rod 9, so that the first fixed rod 9 can be driven to rotate by the motor 8.

[0026] See also Figure 1 and Figure 2 An oil inlet pipe 4 is fixedly provided on one side of the outside of the mounting base 2, and an oil outlet pipe 5 is fixedly provided on the other side of the outside of the mounting base 2. The oil inlet pipe 4 and the oil outlet pipe 5 are both connected to the driving chamber 3. Valves 6 are fixedly provided on the outside of the oil inlet pipe 4 and the oil outlet pipe 5, which facilitate the opening and closing of the oil inlet pipe 4 and the oil outlet pipe 5 by adjusting the valve 6.

[0027] See also Figure 2 A sleeve 16 is fixedly provided on the other side of the upper end of the mounting seat 2, and a rotating rod 17 is provided inside the sleeve 16. The lower end of the rotating rod 17 extends into the driving cavity 3 and is fixedly connected to the third fixed rod 11, so that the rotating rod 17 can be driven to rotate by the third fixed rod 11.

[0028] See also Figure 1 and Figure 2 The outer sleeve of the rotating rod 17 is provided with a telescopic rod 19. The connection between the telescopic rod 19 and the rotating rod 17 is a threaded structure. The upper end of the telescopic rod 19 extends to the top of the sleeve 16, which is convenient for driving the telescopic rod 19 to extend and retract through the rotating rod 17.

[0029] See also Figure 2 A rubber pad 18 is provided on the outside of the rotating rod 17 at the lower end of the sleeve 16 , and the rubber pad 18 is connected to the sleeve 16 by glue, so as to improve the sealing performance of the sleeve 16 through the rubber pad 18 .

[0030] See also Figure 1 and Figure 2 A sealing ring 20 is fixedly provided on the upper end of the sleeve 16 outside the telescopic rod 19 to prevent impurities in the air from entering the interior of the sleeve 16 through the sealing ring 20.

[0031] Working principle: After the electric push rod has been used for a period of time, the valve 6 outside the oil outlet pipe 5 is opened to discharge the lubricating oil inside the drive chamber 3 until the old lubricating oil is discharged. At this time, the valve 6 outside the oil outlet pipe 5 is closed and the valve 6 outside the oil inlet pipe 4 is opened. New lubricating oil is poured into the drive chamber 3 through the oil inlet pipe 4. At this time, the valve 6 outside the oil inlet pipe 4 is closed again. During the use of the electric push rod, the external thread of the rotating rod 17 drives the telescopic rod 19 to move toward the inside of the sleeve 16 until the telescopic rod 19 moves to a suitable position. At this time, the lower end of the telescopic rod 19 contacts and squeezes the rubber pad 18.

[0032] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. An electric push rod capable of rapid lifting and lowering, comprising a base (1), characterized in that: A mounting seat (2) is fixedly provided at the upper end of the base (1), a driving cavity (3) is provided inside the mounting seat (2), a first fixing rod (9) is provided on one side inside the driving cavity (3), the first fixing rod (9) is rotatably connected to the inner wall of the driving cavity (3), a second fixing rod (10) is provided at a middle position inside the driving cavity (3), the second fixing rod (10) is rotatably connected to the inner wall of the driving cavity (3), a third fixing rod (11) is provided on the other side inside the driving cavity (3), the third fixing rod (11) is rotatably connected to the inner wall of the driving cavity (3), The inner wall of the driving chamber (3) is rotatably connected, a driving gear (12) is fixedly provided on the outside of the first fixing rod (9), a first connecting gear (13) is fixedly provided on the upper part of the outside of the second fixing rod (10), and the first connecting gear (13) is meshedly connected with the driving gear (12), a second connecting gear (14) is fixedly provided on the lower part of the outside of the second fixing rod (10), and a transmission gear (15) is fixedly provided on the outside of the third fixing rod (11), and the transmission gear (15) is meshedly connected with the second connecting gear (14).

2. The electric push rod capable of rapid lifting according to claim 1, characterized in that: A protective shell (7) is fixedly provided on one side of the upper end of the mounting seat (2), a motor (8) is fixedly provided inside the protective shell (7), and an output shaft of the motor (8) extends into the interior of the drive cavity (3) and is fixedly connected to a first fixing rod (9).

3. The electric push rod capable of rapid lifting according to claim 2, characterized in that: An oil inlet pipe (4) is fixedly provided on one side of the outside of the mounting seat (2), and an oil outlet pipe (5) is fixedly provided on the other side of the outside of the mounting seat (2). Both the oil inlet pipe (4) and the oil outlet pipe (5) are communicated with the drive chamber (3), and valves (6) are fixedly provided on the outside of both the oil inlet pipe (4) and the oil outlet pipe (5).

4. The electric push rod capable of rapid lifting according to claim 3, characterized in that: A sleeve (16) is fixedly provided on the other side of the upper end of the mounting seat (2), a rotating rod (17) is provided inside the sleeve (16), and the lower end of the rotating rod (17) extends into the interior of the driving cavity (3) and is fixedly connected to the third fixed rod (11).

5. The electric push rod capable of rapid lifting according to claim 4, characterized in that: The outer sleeve of the rotating rod (17) is provided with a telescopic rod (19), and the connection between the telescopic rod (19) and the rotating rod (17) is a threaded structure. The upper end of the telescopic rod (19) extends to the upper side of the sleeve (16).

6. The electric push rod capable of rapid lifting according to claim 5, characterized in that: The rotating rod (17) is provided with a rubber pad (18) outside the lower end of the sleeve (16), and the rubber pad (18) is connected to the sleeve (16) by glue.

7. The electric push rod capable of rapid lifting according to claim 6, characterized in that: A sealing ring (20) is fixedly provided on the upper end of the sleeve (16) located outside the telescopic rod (19).

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