阅读说明：本技术 一种高强度电动推杆 (High-strength electric push rod ) 是由 倪建芬 于 2018-07-12 设计创作，主要内容包括：本发明公开一种高强度电动推杆,属于电动推杆技术领域,包括支撑座、电机、传动机构、螺杆、螺母组、内管和外管,所述电机、传动机构和外管均固定安装在支撑座上,所述内管套设在外管的内部,所述螺杆穿设在内管的内部,所述电机通过传动机构与螺杆传动连接,所述螺母组螺纹连接在螺杆上,所述内管与螺母组固定连接,所述螺母组带动内管沿螺杆的长度方向运行。本发明设计合理,结构新颖,通过采用金属和塑料一体化的螺母结构,保证了推杆的整体强度和润滑效果；且推杆整体防水防尘性能好,适用于各种恶劣工况环境下使用,且便于保养和维护,延长推杆的使用寿命。(The invention discloses a high-strength electric push rod, which belongs to the technical field of electric push rods and comprises a supporting seat, a motor, a transmission mechanism, a screw rod, a nut group, an inner pipe and an outer pipe, wherein the motor, the transmission mechanism and the outer pipe are fixedly arranged on the supporting seat, the inner pipe is sleeved in the outer pipe, the screw rod penetrates through the inner pipe, the motor is in transmission connection with the screw rod through the transmission mechanism, the nut group is in threaded connection with the screw rod, the inner pipe is fixedly connected with the nut group, and the nut group drives the inner pipe to move along the length direction of the screw rod. The push rod is reasonable in design and novel in structure, and the integral strength and the lubricating effect of the push rod are ensured by adopting a nut structure integrating metal and plastic; and the push rod is good in overall waterproof and dustproof performance, is suitable for being used in various severe working condition environments, is convenient to maintain and prolong the service life of the push rod.)

1. The utility model provides a high strength electric putter, includes supporting seat, motor, drive mechanism, screw rod, nut group, inner tube and outer tube, the equal fixed mounting of motor, drive mechanism and outer tube is on the supporting seat, the inside at the outer tube is established to the inner tube cover, the inside at the inner tube is worn to establish by the screw rod, the motor passes through drive mechanism and is connected with the screw rod transmission, nut group threaded connection is on the screw rod, inner tube and nut group fixed connection, nut group drives the inner tube and moves characterized by along the length direction of screw rod: the nut group comprises a connecting sleeve, a plastic nut and a metal nut, the metal nut and the plastic nut are in threaded connection with the outside of the screw rod, the connecting sleeve is fixedly connected to the metal nut and the plastic nut to form a whole, and one end of the inner tube is fixedly connected to the connecting sleeve.

2. The high-strength electric putter as set forth in claim 1, wherein: a check block is arranged in the connecting sleeve and divides the connecting sleeve into an inner pipe connecting end and a nut connecting end, and the inner pipe is in threaded connection with the inner part of the inner pipe connecting end; and the plastic nut and the metal nut are both in threaded connection in the nut connecting end.

3. The high-strength electric putter as set forth in claim 2, wherein: the inside of plastics nut screw in nut link is contradicted with the dog and is set up, the inside and the plastics nut of the one end screw in nut link of metal nut are contradicted and are set up, the other end fixedly connected with slide of metal nut, the inner wall sliding connection of slide and outer tube.

4. A high strength electric putter as claimed in claim 3, wherein: the metal nut and the plastic nut are integrated, the sliding seat is molded on the metal nut in an injection mode, and the metal nut is provided with a connecting groove corresponding to the outer edge of the sliding seat.

5. The high-strength electric putter as set forth in claim 2, wherein: an oil storage groove is formed in the inner wall of one end, close to the plastic nut, of the metal nut, and the depth of the oil storage groove is smaller than the length of the metal nut screwed into the connecting sleeve.

6. The high-strength electric putter as set forth in claim 2, wherein: the screw thread of the inner wall of the plastic nut comprises a tight part close to the stop block and a loose part far away from the stop block, the tight part is conical, the diameter of the tight part is gradually reduced towards the stop block, and one end of the tight part close to the stop block is in interference fit with the screw rod.

7. The high-strength electric putter as set forth in claim 1, wherein: electric putter is still including bearing the device, bear the device and set up on the supporting seat, bear the device and bear the seat including setting up two on the supporting seat, the inside of bearing the seat all is provided with radial bearing, bear the relative one side of seat and all be provided with the bearing frame, the inside of bearing frame is provided with thrust bearing, thrust bearing and radial bearing set up on same axis, the screw rod passes thrust bearing and radial bearing setting, the outside fixedly connected with fixed block of screw rod, the fixed block is contradicted and is set up between two thrust bearing, two the cover is equipped with the protection casing between the bearing frame, radial bearing is waterproof deep groove ball bearing.

8. The high-strength electric putter as set forth in claim 1, wherein: the supporting seat is fixedly provided with a connector, a joint is arranged in the middle of the connector, an outer ring of the joint and the connector are of a universal connection structure, an inner ring of the joint is provided with a rolling bearing, and the rolling bearing is a deep groove ball bearing or a needle roller bearing.

9. The high-strength electric putter as set forth in claim 1, wherein: a guide sleeve is arranged between the outer pipe and the inner pipe, and the guide sleeve is fixedly arranged at one end of the outer pipe, which is far away from the supporting seat; and a Hall sensor is arranged on the motor.

10. The high-strength electric putter as set forth in claim 2, wherein: the end face of the plastic nut, which is attached to the stop block, is provided with an attaching groove, and one side of the stop block, which is close to the plastic nut, is provided with a lubricating groove.

Technical Field

The invention discloses a high-strength electric push rod, and belongs to the technical field of electric push rods.

Background

At present, the electric push rod is a widely used driving technology, for example, used in products such as automation equipment, automatic lifting platform, massage chair, etc., and has the advantages of light weight, small structural size, convenient operation, easy installation, low noise, etc., and can provide accurate power output and improve the precision of manufacturing automation.

The nut and the screw are key mechanisms inside the electric push rod, and the connection structure of the nut and the screw directly influences the operation stability and the service life of the electric push rod. Most of the existing push rod nuts are made of all plastic materials or all metal materials, and the structure is too simple. The nut made of the all-plastic material has small friction coefficient, good lubricating effect and poor strength performance, and the plastic nut is easy to deform, damage and loosen during the use of the push rod for a long time or under a large load, so that the operation of the electric push rod is influenced; the nut made of all metal has high structural strength and is suitable for being used in a process of larger load, but the nut has larger friction coefficient with the screw rod, so that the abrasion consumption is larger in a long-time use process, and the service life of the electric push rod is influenced; and adopt the mode that metal and plastics combine, can guarantee the structural strength of nut, improve the bearing range of push rod, can reduce the wearing and tearing of nut and screw rod in certain extent again, nevertheless connect unstablely between metal and the plastics, defects such as card pause appear easily in the push rod operation process. Therefore, an electric push rod is needed to meet the use requirement of the electric push rod.

SUMMERY OF THE UTILITY MODEL

In view of the defects in the prior art, the present invention is directed to provide a high strength electric putter, so as to solve the problems in the background art.

In order to achieve the purpose, the invention provides the following technical scheme to realize the purpose:

the utility model provides a high strength electric putter, includes supporting seat, motor, drive mechanism, screw rod, nut group, inner tube and outer tube, the equal fixed mounting of motor, drive mechanism and outer tube is on the supporting seat, the inside at the outer tube is established to the inner tube cover, the inside at the inner tube is worn to establish by the screw rod, the motor passes through drive mechanism and is connected with the screw rod transmission, nut group threaded connection is on the screw rod, inner tube and nut group fixed connection, nut group drives the inner tube and moves characterized by along the length direction of screw rod: the nut group comprises a connecting sleeve, a plastic nut and a metal nut, the metal nut and the plastic nut are in threaded connection with the outside of the screw rod, the connecting sleeve is fixedly connected to the metal nut and the plastic nut to form a whole, and one end of the inner tube is fixedly connected to the connecting sleeve.

Preferably, the method comprises the following steps: a check block is arranged in the connecting sleeve and divides the connecting sleeve into an inner pipe connecting end and a nut connecting end, and the inner pipe is in threaded connection with the inner part of the inner pipe connecting end; and the plastic nut and the metal nut are both in threaded connection in the nut connecting end.

Preferably, the method comprises the following steps: the inside of plastics nut screw in nut link is contradicted with the dog and is set up, the inside and the plastics nut of the one end screw in nut link of metal nut are contradicted and are set up, the other end fixedly connected with slide of metal nut, the inner wall sliding connection of slide and outer tube.

Preferably, the method comprises the following steps: the metal nut and the plastic nut are integrated; the sliding seat is formed in a metal nut in an injection molding mode, and the metal nut is provided with a connecting groove corresponding to the outer edge of the sliding seat.

Preferably, the method comprises the following steps: an oil storage groove is formed in the inner wall of one end, close to the plastic nut, of the metal nut, and the depth of the oil storage groove is smaller than the length of the metal nut screwed into the connecting sleeve.

Preferably, the method comprises the following steps: the threads inside the plastic nut are tighter than the threads inside the metal nut; the screw thread of the inner wall of the plastic nut comprises a tight part close to the stop block and a loose part far away from the stop block, the tight part is conical, the diameter of the tight part is gradually reduced towards the stop block, and one end of the tight part close to the stop block is in interference fit with the screw rod.

Preferably, the method comprises the following steps: electric putter is still including bearing the device, bear the device and set up on the supporting seat, bear the device and bear the seat including setting up two on the supporting seat, the inside of bearing the seat all is provided with radial bearing, bear the relative one side of seat and all be provided with the bearing frame, the inside of bearing frame is provided with thrust bearing, thrust bearing and radial bearing set up on same axis, the screw rod passes thrust bearing and radial bearing setting, the outside fixedly connected with fixed block of screw rod, the fixed block is contradicted and is set up between two thrust bearing, two the cover is equipped with the protection casing between the bearing frame, radial bearing is waterproof deep groove ball bearing.

Preferably, the method comprises the following steps: the supporting seat is fixedly provided with a connector, a joint is arranged in the middle of the connector, an outer ring of the joint and the connector are of a universal connection structure, an inner ring of the joint is provided with a rolling bearing, and the rolling bearing is a deep groove ball bearing or a needle roller bearing.

Preferably, the method comprises the following steps: a guide sleeve is arranged between the outer pipe and the inner pipe, and the guide sleeve is fixedly arranged at one end of the outer pipe, which is far away from the supporting seat; and a Hall sensor is arranged on the motor.

Preferably, the method comprises the following steps: the end face of the plastic nut, which is attached to the stop block, is provided with an attaching groove, and one side of the stop block, which is close to the plastic nut, is provided with a lubricating groove.

The push rod is reasonable in design and novel in structure, and the integral strength and the lubricating effect of the push rod are ensured by adopting a nut structure integrating metal and plastic; and the push rod is good in overall waterproof and dustproof performance, is suitable for being used in various severe working condition environments, is convenient to maintain and prolong the service life of the push rod.

Through adopting the mode of metal nut and plastics nut combination to cooperate, both guaranteed the bulk strength of push rod nut group, be applicable to high load work, the coefficient of friction between the screw rod of plastics nut and metal is less, has reduced daily use's wearing and tearing, has reduced electric putter's energy consumption, has increased electric putter's life.

The connecting sleeve is sleeved outside the metal nut and the plastic nut, so that the metal section and the plastic section form an integral structure, the connecting strength and the assembling precision between the plastic nut and the metal nut are improved, and the bearing strength of the push rod nut group is further improved; and set up the dog through the inside at adapter sleeve, conveniently fix a position the mounted position of plastics nut and metal nut, operating personnel only need can accomplish the assembly with plastics nut and metal nut screw in nut link's inside in proper order to further fix between metal nut and adapter sleeve through the welded mode, prevent that axial rotation from appearing in the nut group and not hard up.

The inner pipe is in threaded connection with the inside of the connecting sleeve, and is fixed and limited in a welding mode, so that the mounting and the fixing are convenient; and connecting sleeve's diameter is greater than the diameter of inner tube, even appear breaking when the inside screw thread of nut group, nut group and inner tube outwards break away from, and the great connecting sleeve of diameter can play the effect that blocks with the anticreep, and the joint prevents that the inner tube is whole to break away from and cause further harm from the outer tube is inside in the inside of outer tube.

The thread inside the plastic nut is tighter than the thread inside the metal nut, the plastic nut is tightly matched outside the screw rod, the metal nut is loosely matched outside the screw rod, under the condition of light load, the plastic nut and the screw rod are mainly in thread matching motion, the friction coefficient between the plastic and the screw rod is relatively small, the abrasion is small, the daily abrasion is reduced, the energy consumption of the push rod is reduced, and the overall operation stability of the push rod is improved; under the condition of large load, the plastic nut is elastically deformed, and the metal nut and the plastic nut bear stress simultaneously, so that the plastic nut is prevented from being damaged, and the integral bearing strength and the operation stability of the push rod are improved; and set up the oil storage tank in metal nut's inside, the inside packing of oil storage tank has the grease, and the grease can lubricate between screw rod and the metal nut in the push rod operation process, reduces the friction, reduces the energy consumption, has promoted push rod operation life-span.

The screw thread of the inner wall of the plastic nut comprises a tight part close to the stop block and a loose part far away from the stop block, the tight part is conical, the diameter of the tight part is gradually reduced towards the direction of the stop block, the tight part is in interference fit with the screw rod, and the tight part and the screw rod are mutually extruded and attached tightly, so that certain damping exists between the nut group and the screw rod, and the running stability of the nut group is improved.

By arranging the bearing device, the thrust bearing and the radial bearing in the bearing device can bear axial pushing force, axial pulling force and radial side-tipping force borne by the push rod, the stress of the push rod is comprehensively and independently borne, and the bearing strength and the side-tipping resistance strength of the push rod are improved; and set up waterproof deep groove ball bearing and protection casing, carry out waterproof and dirt-proof protection to the core part that bears the weight of the device, prevent the impurity invasion to ensure the push rod steady operation.

Through setting up the connector, the inside joint of connector connects and antifriction bearing convenience of customers carries out erection joint to the push rod, and the skew of joint ability adjustment side direction, antifriction bearing can form the swivelling joint relation with the dead lever to make the push rod rotatory more smooth and easy, and joint connects and antifriction bearing is the structure that can dismantle the replacement, makes things convenient for the maintenance in later stage.

Drawings

Fig. 1 is a schematic structural view of a high-strength electric push rod according to the present invention.

Fig. 2 is a schematic structural diagram of the nut set of the present invention.

Fig. 3 is a schematic structural view of the connecting sleeve of the present invention.

Fig. 4 is an enlarged view of a portion a in fig. 2.

Fig. 5 is a schematic structural view of the plastic nut of the present invention.

Fig. 6 is a schematic structural diagram of the carrying device of the present invention.

Fig. 7 is a schematic structural diagram of the connecting head of the present invention.

Reference numerals: 1. a supporting seat; 2. a motor; 3. a transmission mechanism; 4. a screw; 5. a nut set; 6. an inner tube; 7. an outer tube; 8. a guide sleeve; 9. a carrying device; 10. a connector; 11. a Hall sensor; 12. a slide base; 13. a metal nut; 14. a plastic nut; 15. a connecting sleeve; 16. an oil storage tank; 17. connecting grooves; 18. a stopper; 19. an inner tube connecting end; 20. a nut connecting end; 21. a bearing seat; 22. a thrust bearing; 23. a protective cover; 24. a fixed block; 25. a radial bearing; 26. a joint; 27. a rolling bearing; 28. a bearing seat; 29. lubricating the groove; 30. tightly adhering to the groove; 31. a tightening section; 32. a loose part.

Detailed Description

A high-strength electric putter according to the present invention will be further described with reference to fig. 1 to 7.

A high-strength electric push rod comprises a supporting seat 1, a motor 2, a transmission mechanism 3, a screw rod 4, a nut group 5, an inner tube 6 and an outer tube 7, wherein the motor 2, the transmission mechanism 3 and the outer tube 7 are all fixedly installed on the supporting seat 1, the inner tube 6 is sleeved inside the outer tube 7, the screw rod 4 is arranged inside the inner tube 6 in a penetrating mode, the motor 2 is in transmission connection with the screw rod 4 through the transmission mechanism 3, the nut group 5 is in threaded connection with the screw rod 4, the inner tube 6 is fixedly connected with the nut group 5, and the nut group 5 drives the inner tube 6 to move along the length direction of the screw rod; the nut group 5 comprises a connecting sleeve 15, a plastic nut 14 and a metal nut 13, the metal nut 13 and the plastic nut 14 are in threaded connection with the outside of the screw rod 4, the connecting sleeve 15 is fixedly connected to the metal nut 13 and the plastic nut 14 to form a whole, and one end of the inner pipe 6 is fixedly connected to the connecting sleeve 15.

A stop block 18 is arranged in the connecting sleeve 15, the stop block 18 divides the connecting sleeve 15 into an inner tube connecting end 19 and a nut connecting end 20, and the inner tube 6 is connected in the inner tube connecting end 19 in a threaded manner; the plastic nut 14 and the metal nut 13 are both screwed inside the nut connection end 20.

The plastic nut 14 is screwed into the nut connecting end 20 and is abutted against the stop block 18, one end of the metal nut 13 is screwed into the nut connecting end 20 and is abutted against the plastic nut 14, the other end of the metal nut 13 is fixedly connected with the sliding seat 12, and the sliding seat 12 is slidably connected with the inner wall of the outer tube 7.

The metal nut 13 and the plastic nut 14 are integral; the slide 12 is injection molded on a metal nut 13, and the metal nut 13 is provided with a connecting groove 17 corresponding to the outer edge of the slide 12.

An oil storage groove 16 is arranged on the inner wall of one end of the metal nut 13 close to the plastic nut 14, and the depth of the oil storage groove 16 is smaller than the length of the metal nut 13 screwed into the connecting sleeve 15.

The threads inside the plastic nut 14 are tighter than the threads inside the metal nut 13; the thread of the inner wall of the plastic nut 14 comprises a tight part 31 close to the stop block 18 and a loose part 32 far away from the stop block 18, the tight part 31 is conical, the diameter of the tight part 31 is gradually reduced towards the stop block 18, and one end of the tight part 31 close to the stop block 18 is in interference fit with the screw rod 4.

Electric putter still includes load-bearing device 9, load-bearing device 9 sets up on supporting seat 1, load-bearing device 9 bears seat 28 including two that set up on supporting seat 1, the inside that bears seat 28 all is provided with radial bearing 25, bear one side that seat 28 is relative all to be provided with bearing frame 21, the inside of bearing frame 21 is provided with thrust bearing 22, thrust bearing 22 and radial bearing 25 set up on same axis, screw rod 4 passes thrust bearing 22 and radial bearing 25 setting, screw rod 4's outside fixedly connected with fixed block 24, fixed block 24 is contradicted and is set up between two thrust bearing 22, the cover is equipped with protection casing 23 between two bearing frame 21, radial bearing 25 is waterproof deep groove ball bearing.

The supporting seat 1 is further fixedly provided with a connector 10, the middle of the connector 10 is provided with a joint 26, the outer ring of the joint 26 and the connector 10 are in a universal connection structure, the inner ring of the joint 26 is provided with a rolling bearing 27, and the rolling bearing 27 is a deep groove ball bearing or a needle roller bearing.

A guide sleeve 8 is arranged between the outer tube 7 and the inner tube 6, and the guide sleeve 8 is fixedly arranged at one end of the outer tube 7 far away from the supporting seat 1; the motor 2 is provided with a hall sensor 11.

The end face of the plastic nut 14, which is attached to the stop block 18, is provided with an attaching groove 30, and one side of the stop block 18, which is close to the plastic nut 14, is provided with a lubricating groove 29; lubricating oil is arranged in the close-contact groove 30 and the lubricating groove 29.

The push rod is reasonable in design and novel in structure, and the integral strength and the lubricating effect of the push rod are ensured by adopting a nut structure integrating metal and plastic; and the push rod is good in overall waterproof and dustproof performance, is suitable for being used in various severe working condition environments, is convenient to maintain and prolong the service life of the push rod.

Through adopting the mode of metal nut 13 and the combination of plastics nut 14 to cooperate, both guaranteed the bulk strength of push rod nut group 5, be applicable to high load work, the coefficient of friction between plastics nut 14 and the metallic screw rod 4 is less, has reduced daily use's wearing and tearing, has reduced electric putter's energy consumption, has increased electric putter's life.

The metal section and the plastic section form an integral structure by sleeving the connecting sleeve 15 outside the metal nut 13 and the plastic nut 14, so that the connection strength and the assembly precision between the plastic nut 14 and the metal nut 13 are improved, and the bearing strength of the push rod nut group 5 is further improved; and through set up dog 18 in the inside of connecting sleeve 15, conveniently fix a position the mounted position of plastics nut 14 and metal nut 13, operating personnel only need to screw in plastics nut 14 and metal nut 13 in proper order in the inside of nut link 20 and can accomplish the assembly to further fix between metal nut 13 and connecting sleeve 15 through the welded mode, prevent that axial rotation from appearing in nut group 5 and becoming flexible.

The inner pipe 6 is in threaded connection with the inside of the connecting sleeve 15 and is fixed and limited in a welding mode, so that the installation and the fixation are convenient; and the diameter of the connecting sleeve 15 is larger than that of the inner tube 6, even when the thread in the nut group 5 is broken, the nut group 5 and the inner tube 6 are separated outwards, the connecting sleeve 15 with the larger diameter can play the role of blocking and preventing the inner tube 6 from being separated from the inner part of the outer tube 7 to cause further damage.

The internal thread of the plastic nut 14 is tighter than the internal thread of the metal nut 13, the plastic nut 14 is tightly matched with the external part of the screw rod 4, the metal nut 13 is loosely matched with the external part of the screw rod 4, under the condition of light load, the plastic nut 14 and the screw rod 4 move in a thread matching way, the friction coefficient between the plastic and the screw rod 4 is relatively small, the abrasion is small, the daily abrasion is reduced, the energy consumption of the push rod is reduced, and the overall operation stability of the push rod is improved; under the condition of large load, the plastic nut 14 elastically deforms, the metal nut 13 and the plastic nut 14 bear stress simultaneously, the metal nut 13 is made of copper materials or stainless steel materials, the strength is high, the plastic nut 14 is prevented from being damaged, and the integral bearing strength and the running stability of the push rod are improved; and set up oil storage tank 16 in metal nut 13's inside, the inside packing of oil storage tank 16 has the grease, and the grease can lubricate between screw 4 and the metal nut 13 in the push rod operation process, reduces the friction, reduces the energy consumption, has promoted push rod operation life.

The screw thread of the inner wall of the plastic nut 14 comprises a tight part 31 close to the stop block 18 and a loose part 32 far away from the stop block 18, the tight part 31 is conical, the diameter of the tight part 31 is gradually reduced towards the stop block 18, the tight part 31 is in interference fit with the screw rod 4, and the tight part 31 and the screw rod 4 are mutually extruded and attached tightly, so that certain damping exists between the nut group 5 and the screw rod 4, and the running stability of the nut group 5 is improved.

By arranging the bearing device 9, the thrust bearing 22 and the radial bearing 25 in the bearing device 9 can bear axial pushing force, pulling force and radial side-tipping force borne by the push rod, and bear the stress of the push rod independently in all aspects, so that the bearing strength and the side-tipping resistance strength of the push rod are improved; and set up waterproof deep groove ball bearing and protection casing 23, carry out waterproof and dirt-proof protection to the core assembly who bears device 9, prevent the impurity invasion to ensure the push rod steady operation.

Through setting up connector 10, the inside joint of connector 10 connects 26 and antifriction bearing 27 convenience of customers to the push rod carry out erection joint, and the skew of side direction can be adjusted to joint 26, and antifriction bearing 27 can form the swivelling joint relation with the dead lever to make the push rod rotatory more smooth and easy, and joint 26 and antifriction bearing 27 are the structure of dismantling the replacement, make things convenient for the maintenance in later stage.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.