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CN-224204902-U - Impact-resistant electric cylinder

CN224204902UCN 224204902 UCN224204902 UCN 224204902UCN-224204902-U

Abstract

The utility model provides an impact-resistant electric cylinder, which belongs to the technical field of engineering machinery and comprises a screw rod pair arranged in an outer tube, wherein a screw rod in the screw rod pair is driven to rotate by a servo motor, a nut is driven to reciprocate along the surface of the screw rod when the screw rod rotates, a connecting tube is fixed at the upper end of the nut, a push rod is sleeved at the upper end of the screw rod, the push rod forms hooking and pulling fit with an extension block at the upper end of the connecting tube, a pressure spring is sleeved on the surface of the connecting tube, the upper end of the pressure spring is contacted with the lower end face of the push rod, and when the nut pushes the push rod to move forward and linearly by the pressure spring, the impact-resistant electric cylinder can absorb impact energy and convert the impact energy into elastic potential energy, so that direct damage of impact to core components such as the screw rod pair and the gear pair is effectively reduced, component failure caused by impact is avoided, and the service life of the electric cylinder under a high impact working condition is remarkably prolonged.

Inventors

  • JIA HULIN

Assignees

  • 西安华欧精密机械有限责任公司

Dates

Publication Date
20260505
Application Date
20250506

Claims (10)

  1. 1. The utility model provides an anti-impact electric cylinder, includes the screw pair of installing in outer tube (100), screw rod (200) in the screw pair are rotatory through servo motor (400) drive, drive nut (300) when screw rod (200) rotate and carry out reciprocal rectilinear motion along screw rod (200) surface, wherein nut (300) upper end is fixed with connecting pipe (600), screw rod (200) upper end cover is equipped with push rod (500), push rod (500) are through forming the cooperation of colluding with the epitaxial piece of connecting pipe (600) upper end, connecting pipe (600) surface cover is equipped with pressure spring (601), the upper end of pressure spring (601) is contacted with the lower terminal surface of push rod (500), when push rod (500) are carried out forward rectilinear motion through pressure spring (601) promotion push rod (500), push rod (500) are received reverse impact pressure, nut (300) can compress pressure spring (601) when screw rod (200) surface reverse rectilinear motion, push rod (600) are through the cooperation of colluding of its epitaxial piece and push rod (500), push rod (600) can drive and reset.
  2. 2. The impact resistant electric cylinder as set forth in claim 1, wherein the push rod (500) is provided with a cavity inside, the push rod (500) is sleeved on the surface of the screw rod (200) through the cavity inside, and an inner extension block which is hooked and matched with an extension block of the upper end surface of the connecting pipe (600) is arranged on the lower end surface of the push rod (500).
  3. 3. An impact resistant electric cylinder as set forth in claim 1, wherein a transmission mechanism is provided at the lower end of the outer tube (100), and the servo motor (400) drives the screw rod (200) in the screw rod pair to rotate through the transmission mechanism.
  4. 4. An impact resistant electric cylinder as claimed in claim 3, wherein said gear transmission comprises a primary gear pair and a secondary gear pair (702), the primary gear pair being connected to the output shaft of the servo motor (400), the secondary gear pair (702) being connected to the screw (200) of the screw pair.
  5. 5. An impact resistant electric cylinder as set forth in claim 4, wherein said gear transmission mechanism further comprises a gear housing (700), said primary gear pair and said secondary gear pair (702) are disposed on both sides in said gear housing (700), respectively, and said servo motor (400) is mounted on an upper side of said gear housing (700).
  6. 6. The anti-impact electric cylinder as set forth in claim 5, wherein a thrust bearing (703) is disposed in the gear housing (700), the thrust bearing (703) is sleeved at the end of the screw rod (200) in the screw rod pair, a bearing (704) is further disposed at one side of the inside of the gear housing (700), and the bearing (704) is sleeved on the output shaft of the servo motor (400).
  7. 7. An impact resistant electric cylinder as claimed in claim 5, characterized in that the gear housing (700) is bolted to the outer tube (100).
  8. 8. An impact resistant electric cylinder as in claim 5 wherein the bottom of the gear housing (700) is bolted to a gear box cover (800).
  9. 9. An impact resistant electric cylinder as claimed in claim 1, wherein the outer wall of the outer tube (100) is provided with a trunnion (101), the trunnion (101) is hinged to the body, a movable support lug (501) is fixed at the upper end of the push rod (500), and the movable support lug (501) is connected with a movable part of the body.
  10. 10. An impact resistant electric cylinder as claimed in claim 1, wherein the connection pipe (600) is connected to the nut (300) by screw-fitting.

Description

Impact-resistant electric cylinder Technical Field The utility model relates to the technical field of engineering machinery, in particular to an impact-resistant electric cylinder. Background The electric cylinder is a precision electromechanical integrated device for converting electric energy into linear motion, a screw pair or a belt transmission mechanism is driven by a servo motor, rotary motion is converted into high-precision and controllable linear displacement, the linear displacement is taken as a typical representative of a modern linear motion mechanism, the electric cylinder is widely applied to a plurality of important fields such as industrial processing, simulation instruments, medical machinery, engineering trucks and the like, the working condition of the electric cylinder is more and more complicated along with the continuous widening of the application field, the electric cylinder is gradually applied to replace an oil cylinder in the fields such as engineering machinery and the like in recent years, the working condition characteristics of the electric cylinder are multiple-impact, such as an excavator, a bulldozer, a crusher and the like, and the electric cylinder needs to bear larger impact load in the working process. However, due to the transmission characteristics of mechanical rigid connection, most of the existing electric cylinders do not have the capability of buffering impact, and cannot directly drive heavy load and bear impact load, so that the electric cylinders are limited in use in the occasion of impact resistance. In equipment of motion states such as excavator, the push rod of electronic jar can bear impact load many times in its motion process, and the high strength impact load of many times can lead to the inside of electronic jar through the push rod, causes electronic jar atress part inefficacy, influences electronic jar atress part performance, reduces the life of electronic jar. Disclosure of utility model In view of the above, the utility model provides an impact-resistant electric cylinder, which is capable of absorbing impact energy through compression of a pressure spring and converting the impact energy into elastic potential energy when a push rod bears reverse impact load, so that direct damage of impact to core components such as a screw pair, a gear pair and the like is effectively reduced, component failure caused by the impact is avoided, and the service life of the electric cylinder under a high impact working condition is remarkably prolonged. In order to solve the technical problems, the utility model provides an impact-resistant electric cylinder, which comprises a screw rod pair arranged in an outer tube, wherein a screw rod in the screw rod pair is driven to rotate through a servo motor, a nut is in linear sliding fit with the inner wall of the outer tube through a key guide block, the screw rod drives the nut to reciprocate along the surface of the screw rod when rotating, a connecting tube is fixed at the upper end of the nut, an extension block extends outwards from the upper end surface of the connecting tube, a push rod is sleeved at the upper end of the screw rod, the push rod is in hooking fit with the extension block at the upper end of the connecting tube, a pressure spring is sleeved on the surface of the connecting tube, the upper end of the pressure spring is contacted with the lower end surface of the push rod, when the nut moves forwards in the direction of the push rod, the nut drives the push rod to synchronously move forwards through the pressure spring, at the moment, if the push rod receives reverse impact force in the moving process, the push rod can compress the pressure spring, so that the pressure spring absorbs impact energy and converts into elastic potential energy to buffer impact received by the push rod, and then the nut rebounds when the surface of the screw rod moves reversely, and the connecting tube is driven to synchronously move through the extension block to hook the push rod. The cavity has been seted up to the inside of push rod, the push rod is established on the lead screw surface through inside cavity cover, and the lower terminal surface of push rod be provided with the outer piece of connecting pipe up end and collude each other draw complex interior piece of extending for the interior piece of extending of push rod and the outer piece of connecting pipe form the cooperation of interlock each other, and when the nut reset moves and makes the pressure spring rebound, the nut drives the connecting pipe synchronous motion, colludes each other through the interior piece of extending of connecting pipe and the interior piece of extending of push rod and draws, makes the connecting pipe can drive the push rod and resets. The lower end of the outer tube is provided with a transmission mechanism, and the servo motor drives a screw rod in the screw rod pair to rotate through the transmission mechanism of the gea