CN110380572A - Electric pushrod - Google Patents

Abstract

The invention discloses an electric push rod, which comprises a fuselage, an AC motor and a lead screw for inputting power are arranged on the fuselage, an intermediate gear assembly connecting the AC motor and the lead screw is arranged in the fuselage, and the intermediate gear assembly includes The motor gear meshed with the output shaft of the AC motor, the motor gear is meshed with an intermediate gear, and the nut gear is meshed below the intermediate gear, and the nut gear meshes with the lead screw. The bar and the intermediate gear are integrally formed by the bull gear and the pinion, the bull gear meshes with the motor gear, and the pinion gear meshes with the nut gear. Through the above method, the electric push rod of the present invention effectively improves the transmission accuracy of the electric push rod by designing a new gear transmission assembly structure, and the transmission structure is simple, safe and reliable.

Description

electric putter

technical field

The invention relates to the field of push rods, in particular to an electric push rod.

Background technique

The electric push rod is a kind of linear drive device, which converts the rotary motion of the drive motor into the linear motion of the push rod through the transmission of the lead screw and nut. It can be used as an execution machine in various simple or complex technological processes to realize remote control, centralized control or automatic control. Electric push rods are widely used in electric medical beds, electric sofas, electric booth lifting rods, industrial electric lifting systems, etc. The existing push rod has a complex structure and a large volume, and if the operation is not released, it will cause overturning, thereby damaging the push rod.

Contents of the invention

The main technical problem to be solved by the present invention is to provide an electric push rod. By designing a new gear transmission component structure, the transmission precision of the electric push rod can be effectively improved. The transmission structure is simple, safe and reliable.

In order to solve the above technical problems, a technical solution adopted by the present invention is to provide an electric push rod, including a fuselage, the fuselage is provided with an AC motor and a lead screw for inputting power, and the fuselage is equipped with An intermediate gear assembly connecting the AC motor with the lead screw, the intermediate gear assembly includes a motor gear meshed with the output shaft of the AC motor, an intermediate gear is meshed on the motor gear, and a nut gear is meshed below the intermediate gear, the The nut gear meshes with the lead screw, and the AC motor transmits power to the lead screw through the motor gear, the intermediate gear and the nut gear in turn. The intermediate gear is integrally formed by a large gear and a small gear, and the large gear meshes with the motor gear. The pinion meshes with the nut gear.

In a preferred embodiment of the present invention, a connecting head is installed on the left end of the screw, an upper connecting plate is installed between the connecting head and the leading screw, a pull rod is installed on the lower end of the upper connecting plate, and the pulling rod Through the guide bearing seat, the guide bearing seat is arranged on the fuselage, and the mechanical switch is arranged on the guide bearing seat.

In a preferred embodiment of the present invention, the left and right ends of the lead screw are further provided with bumpers for contacting with the mechanical switch.

In a preferred embodiment of the present invention, a manual shaft is also installed on the motor gear.

In a preferred embodiment of the present invention, the intermediate gear is mounted on an intermediate shaft, and a controller is connected to the left end of the intermediate shaft.

In a preferred embodiment of the present invention, the nut gear is tightly connected with the lead screw through a lock nut.

In a preferred embodiment of the present invention, the right end of the lead screw is provided with a push rod sleeve, an anti-reverse block is provided between the push rod sleeve and the lead screw, and a dustproof cover is provided at the left end of the lead screw. Cover and breathable waterproof valve.

The beneficial effects of the present invention are: the electric push rod of the present invention can effectively improve the transmission precision of the electric push rod by designing a new gear transmission component structure, and the transmission structure is simple, safe and reliable.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative work, wherein:

Fig. 1 is a schematic structural view of a preferred embodiment of the electric push rod of the present invention;

Fig. 2 is a sectional view of Fig. 1;

Fig. 3 is a partial structural schematic diagram of Fig. 1;

The marks of each part in the accompanying drawings are as follows: 1. Body, 2. AC motor, 3. Lead screw, 4. Intermediate gear assembly, 41. Motor gear, 42. Intermediate gear, 43. Nut gear, 44. Bull gear, 45. Pinion, 5. Connector, 6. Upper connecting plate, 7. Pull rod, 8. Guide bearing seat, 9. Mechanical switch, 10. Touch block, 11. Manual shaft, 12. Intermediate shaft, 13. Controller , 14, lock nut, 15, push rod cover, 16, anti-reverse block, 17, dust cover, 18, breathable waterproof valve.

Detailed ways

The technical solutions in the embodiments of the present invention will be described clearly and completely below, obviously, the described embodiments are only some of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Fig. 1 to Fig. 3, an electric push rod includes a body 1, an AC motor 2 and a lead screw 3 for inputting power are arranged on the body 1, and an AC motor 2 and a lead screw 3 are arranged in the body 1. 3 connected intermediate gear assembly 4, the intermediate gear assembly 4 includes a motor gear 41 engaged with the output shaft of the AC motor 2, an intermediate gear 42 is engaged on the motor gear 41, and a nut gear 43 is engaged below the intermediate gear 42, and the nut gear 43 is connected to the wire The rod 3 meshes, and the AC motor 2 transmits power to the lead screw 3 through the motor gear 41, the intermediate gear 42 and the nut gear 43 in turn. The intermediate gear 43 is integrally formed by the large gear 44 and the small gear 45, and the large gear 45 meshes with the motor gear 41. , the pinion gear 45 meshes with the nut gear 43 . The transmission structure is optimized through the combination of motor gear, intermediate gear and main gear, so that the movement accuracy of the screw is better and the operation is more stable.

In addition, a connecting head 5 is installed on the left end of the leading screw 3, an upper connecting plate 6 is installed between the connecting head 5 and the leading screw 3, and a pull rod 7 is installed on the lower end of the upper connecting plate 6, and the pulling rod 7 passes through the guide bearing seat 8, and guides The bearing seat 8 is arranged on the fuselage 1, and the guide bearing seat 8 is provided with a mechanical switch 9.

In addition, bumpers 10 for contacting with the mechanical switch 9 are also provided on the left and right ends of the lead screw 3 .

In addition, a manual shaft 11 is installed on the motor gear 41, and the manual shaft 11 can be fine-tuned when the motor stops.

In addition, the intermediate gear 42 is installed on the intermediate shaft 12 , and the left end of the intermediate shaft 12 is also connected with the controller 13 , and the controller 13 is used for controlling the intermediate gear 42 .

In addition, the nut gear 43 is tightly connected with the lead screw 3 through the lock nut 14 .

In addition, the right end of the leading screw 3 is provided with a push rod cover 15, an anti-reverse block 16 is provided between the push rod cover 15 and the leading screw 3, and a dustproof cover 17 and a ventilating and waterproof valve 18 are provided at the left end 3 of the leading screw.

The specific working principle of the electric push rod of the present invention is as follows: the AC motor 2 starts, the AC motor 2 transmits the power to the motor gear 41, the motor gear 41 transmits the power to the large gear 44, and the large gear 44 rotates to drive the pinion 45 to transmit the power to the nut The gear 43 and the nut gear 43 rotate to push the lead screw 3 to advance or retreat. During the advance or retreat of the lead screw 3, the contact block 10 on the pull rod 7 contacts the mechanical switch 9 to limit the distance that the lead screw 3 advances.

Different from the prior art, the electric push rod of the present invention effectively improves the transmission precision of the electric push rod by designing a new gear transmission component structure, and the transmission structure is simple, safe and reliable.

The above descriptions are only examples of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the description of the present invention, or directly or indirectly used in other related technical fields, shall be The same reasoning is included in the patent protection scope of the present invention.

Claims (7)

1. a kind of electric pushrod, including fuselage, the fuselage is equipped with alternating current generator and lead screw for input power, special Sign is, the intermediate gear assemblies for connecting alternating current generator with lead screw are equipped in the fuselage, and the intermediate gear assemblies include The motor gear engaged with alternating current generator output shaft, is engaged with intermediate gear on the motor gear, below the intermediate gear Be engaged with nut gear, the nut gear is engaged with lead screw, the alternating current generator pass sequentially through motor gear, intermediate gear with And power is transferred to lead screw by nut gear, the intermediate gear is integrally formed by gear wheel and pinion gear, the gear wheel It is engaged with motor gear, the pinion gear is engaged with nut gear.

2. electric pushrod according to claim 1, which is characterized in that connector is installed on the lead screw left end, it is described Upper connective plate is installed, the lower end of the upper connective plate is equipped with pull rod, and the pull rod passes through guide bearing between connector and lead screw Seat, the guide bearing chock are arranged on fuselage, and the guide bearing chock is equipped with mechanical switch.

3. electric pushrod according to claim 2, which is characterized in that be additionally provided on the left and right ends of the lead screw for The collision block of mechanical switch contact.

4. electric pushrod according to claim 1, which is characterized in that be also equipped with manual shaft on the motor gear.

5. electric pushrod according to claim 1, which is characterized in that the intermediate gear is mounted on jackshaft, described The left end of jackshaft is also connected with controller.

6. electric pushrod according to claim 1, which is characterized in that the nut gear is tight by locking nut and lead screw It is solidly connected.

7. electric pushrod according to claim 1, which is characterized in that be arranged with pushing rod sleeve, institute on the right end of the lead screw It states and is equipped with counnter attack switch block between pushing rod sleeve and lead screw, the screw rod left end is equipped with dust cover and breathable water proof valve.