CN210661249U - Electric telescopic push rod - Google Patents

Electric telescopic push rod Download PDF

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Publication number
CN210661249U
CN210661249U CN201921485348.9U CN201921485348U CN210661249U CN 210661249 U CN210661249 U CN 210661249U CN 201921485348 U CN201921485348 U CN 201921485348U CN 210661249 U CN210661249 U CN 210661249U
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China
Prior art keywords
nut
gear
screw rod
guide hole
outer tube
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Active
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CN201921485348.9U
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Chinese (zh)
Inventor
叶伟青
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Shaoxing Shangyu Rongda Industrial Co Ltd
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Shaoxing Shangyu Rongda Industrial Co Ltd
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Priority to CN201921485348.9U priority Critical patent/CN210661249U/en
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Publication of CN210661249U publication Critical patent/CN210661249U/en
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Abstract

The utility model relates to an electronic flexible instrument field discloses an electronic flexible push rod, including outer tube, inner tube, screw rod, nut and driving piece, the outer tube both ends are provided with base and end cover respectively, the screw rod sets up in the outer tube, and one end rotates with the base to be connected, and the other end rotates with the nut to be connected, inner tube and the coaxial setting of screw rod, and inner tube one end penetrates in the outer tube from the end cover and the cover locates outside the screw rod, the nut sets up on the inner tube, inner tube and outer tube joint on the rotation direction, the driving piece set up on the base and be connected with the screw rod and rotate in order to drive the screw rod, be provided with limit switch on the base, the outer wall protrusion of nut is provided with and supports the touch multitouch. The utility model discloses utilize limit switch to inject the shrink stroke of nut, inner tube, avoid the motor to continue to rotate and make the screw thread on screw rod and the nut take place to damage.

Description

Electric telescopic push rod
Technical Field
The utility model belongs to electronic flexible instrument field, in particular to electronic flexible push rod.
Background
The electric push rod is also called a push rod motor, an electric cylinder and a linear actuator. The electric push rod is an electric driving device which converts the rotary motion of a motor into the linear reciprocating motion of the push rod. The device can be used as an execution machine in various simple or complex process flows to realize remote control, centralized control or automatic control.
Current electric putter includes the base, the outer tube, the inner tube, the screw rod, nut and driving piece, the screw rod rotates to be connected on the base, outer tube one end is fixed in on the base and the cover is located outside the screw rod, the inner tube is worn to locate in the outer tube and the cover is located outside the screw rod, the nut set up in the inner tube towards the one end of base and with screw rod threaded connection, the inner tube with the outer tube along the axis joint on the direction of rotation, the driving piece sets up on the base and is connected with the screw rod, in order to drive the screw rod rotation, when the screw rod rotates, the inner tube is close to or keeps away from the base along.
When the driving piece drives the screw rod to rotate, if the nut moves to the position closest to the base along the screw rod, namely the maximum position of the contraction of the inner tube, the driving piece continues to work at the moment, and the nut cannot continue to move, so that the screw rod and the nut are subjected to a wire sliding phenomenon, and the threads on the screw rod and the nut are damaged.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims to provide an electronic flexible push rod can prescribe a limit to the shrink stroke of inner tube, avoids contracting too much back, and the motor continues to rotate and makes the screw thread on screw rod and the nut take place to damage.
The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides an electronic flexible push rod, includes outer tube, inner tube, screw rod, nut and driving piece, and the outer tube both ends are provided with base and end cover respectively, the screw rod sets up in the outer tube, and one end rotates with the base to be connected, and the other end rotates with the nut to be connected, and inner tube and the coaxial setting of screw rod, inner tube one end penetrate the outer tube from the end cover and the cover is located outside the screw rod, the nut sets up on the inner tube, inner tube and outer tube joint in the direction of rotation, and the driving piece sets up on the base and is connected with the screw rod and rotates its: the base is provided with a limit switch, the outer wall of the nut protrudes to be provided with a contact block, and the contact block is located right above the limit switch contact.
Through adopting above-mentioned technical scheme, the driving piece drives the screw rod and rotates, make the nut along screw rod axial displacement, when the nut is close to the base along the screw rod, conflict piece on the nut is close to gradually and contradicts the contact of spacing fast closing and makes limit switch triggered, control driving piece stop work when limit switch triggers, thereby make the nut can not continue to be close to the base, thereby realize to the nut, the restriction of inner tube to base direction motion, avoid the driving piece to continue to drive the screw rod and rotate and the nut takes place the smooth silk often to the base motion, damage the nut even, the condition of screw rod screw thread appears.
Further setting the following steps: the base is provided with a wire groove, the wire groove extends along the length direction of the outer pipe, and the limit switch is arranged in the wire groove.
Through adopting above-mentioned technical scheme, limit switch installs easy to assemble and the wiring in the wire casing, and limit switch's mounted position can be installed according to the position that the user required to select on wire casing length direction, and is more convenient.
Further setting the following steps: the utility model discloses a nut, including outer tube, nut, inner tube, spacing groove, nut outer wall, the spacing groove that a plurality of distributes along outer tube circumference is seted up to the outer tube inner wall, the nut outer wall is provided with along radial protrusion and slides in the spacing lug of spacing groove corresponding with the spacing groove and along outer tube circumference, and the inner tube passes through spacing groove and spacing lug with the outer tube realization joint in the direction of rotation.
Through adopting above-mentioned technical scheme, spacing groove and spacing lug cooperation realize nut and outer tube in the ascending joint of direction of rotation, and the nut rotates along with it when preventing the screw rod to when realizing the screw rod and rotating, the nut moves along the screw rod axial.
Further setting the following steps: the nut includes that main nut and components of a whole that can function independently set up the vice nut on main nut, the jack has been seted up to vice nut towards the terminal surface of main nut, main nut inserts in the jack and leaves the space between terminal surface and the jack bottom surface towards the tip of vice nut, forms the oil storage chamber, the intercommunicating pore has been seted up to vice nut back to the terminal surface of main nut, the intercommunicating pore inner wall is equipped with interior tooth, the screw rod insert in the intercommunicating pore and with main nut threaded connection, screw rod and interior tooth threaded connection just closely cooperate.
By adopting the technical scheme, during installation, lubricating oil is injected into the oil storage cavity, when the driving piece drives the screw rod to rotate so as to enable the nut to slide, the oil storage cavity also moves along the axial direction of the screw rod, so that the lubricating oil is contacted with the surface of the screw rod along with sliding, the lubricating oil is coated on the surface of the screw rod, the skidding of the screw rod is kept, meanwhile, as the nut is in threaded fit with the screw rod, a thread gap exists, the lubricating oil can move along with the gap in threaded fit, and the lubricating and cooling effects between the nut and the screw rod threads are realized; certain lubricating oil is stored in the oil storage cavity, so that the lubricating process can be supplemented, the oil storage cavity is not easy to consume, and the service life of the electric push rod is ensured.
Further setting the following steps: the end face, facing the auxiliary nut, of the main nut is provided with a first oil guide hole, the inner wall of the main nut is provided with a second oil guide hole, the end face, back to the auxiliary nut, of the main nut is provided with a third oil guide hole, and the main nut is internally provided with a vertical oil duct communicated with the first oil guide hole and the third oil guide hole and a horizontal oil duct communicated with the second oil guide hole and the vertical oil duct.
By adopting the technical scheme, the lubricating oil can enter the vertical oil duct along the first oil guide hole and can also be led to the third oil guide hole and the second oil guide hole along the vertical oil duct and the horizontal oil duct, so that a lubricating oil passage is increased; lubricating oil that flows out from the second oil guide hole lubricates the matching part of the nut and the screw rod, and oil that flows out of the third oil guide hole lubricates the top end of the nut and the screw rod, so that the lubricating effect is better.
Further setting the following steps: the first oil guide hole, the second oil guide hole, the third oil guide hole, the horizontal oil duct and the vertical oil duct are all provided with a plurality of oil guide holes and distributed along the circumferential direction of the main nut, the first oil guide hole, the second oil guide hole, the third oil guide hole, the horizontal oil duct and the vertical oil duct are arranged in a one-to-one correspondence mode, an inclined plane is arranged between the end face, facing the auxiliary nut, of the main nut and the inner wall of the main nut, and the first oil guide hole is formed in the inclined plane.
By adopting the technical scheme, the oil guide effect is better due to the multiple groups of oil guide holes and the corresponding oil passages, so that the lubricating and cooling effects are better; the inclined plane plays a role in guiding flow, so that lubricating oil in the oil storage cavity can better enter the first oil guide hole after being subjected to pressure to perform oil circulation.
Further setting the following steps: one of the vertical oil passages extends along the radial direction of the main nut and penetrates through the outer wall of the main nut to form an oil return passage.
Through adopting above-mentioned technical scheme, the lubricating oil that flows to the nut top through the third oil guide hole can be followed oil return passage backward flow. So that the oil way is smoother.
Further setting the following steps: the end part of the screw rod, which is far away from the base, is provided with a sealing head, and the sealing head is provided with a sealing ring which is attached to the outer wall of the inner pipe.
Through adopting above-mentioned technical scheme, realize sealed through sealed head, sealing washer for lubricating oil is inside the inner tube between nut, sealed head, avoids lubricating oil to leak and a large amount of consumption, guarantees life and lubricated effect, reduces the oiling volume.
Further setting the following steps: the driving piece comprises a motor and a speed change gear set, the speed change gear set comprises an output gear, a first gear, a second gear, a third gear, a fourth gear and an input gear, the input gear is connected with the screw rod to drive the screw rod to rotate, the output gear is connected with an output shaft of the motor, the first gear and the second gear are coaxially arranged, the third gear and the fourth gear are coaxially arranged, the first gear is meshed with the output gear, the second gear is meshed with the third gear, and the fourth gear is meshed with the input gear.
Through adopting above-mentioned technical scheme, the motor rotates and drives the input gear and rotate to loop through first gear, second gear, third gear, fourth gear and input gear drive screw rod and rotate, realize different drive ratios through the modulus of gear, the installation is compact, and transmission effect is good, and removable different gears form different drive ratios, adjusts the telescopic speed of push rod.
To sum up, the utility model discloses following beneficial effect has:
1. the driving piece drives the screw to rotate, so that the nut moves axially along the screw, when the nut is close to the base along the screw, the contact block on the nut is gradually close to and abuts against the contact of the limit quick switch, so that the limit switch is triggered, and the driving piece is controlled to stop working when the limit switch is triggered, so that the nut cannot be continuously close to the base, the movement of the nut and the inner pipe towards the base is limited, and the phenomenon that the driving piece continuously drives the screw to rotate and the nut cannot move towards the base normally, so that thread slipping is caused, and even the nut and screw threads are damaged is avoided;
2. during installation, lubricating oil is injected into the oil storage cavity, when the driving piece drives the screw to rotate so as to enable the nut to slide, the oil storage cavity also moves along the axial direction of the screw, so that the lubricating oil is in contact with the surface of the screw along with the sliding, the lubricating oil is coated on the surface of the screw, the skidding of the screw is kept, meanwhile, due to the fact that the nut is in threaded fit with the screw, a thread gap exists, the lubricating oil can move along with the gap in threaded fit, and the lubricating and cooling effects between the nut and the screw threads are achieved; a certain amount of lubricating oil is stored in the oil storage cavity, so that the lubricating process can be supplemented, the oil storage cavity is not easy to consume, and the service life of the electric push rod is ensured;
3. the motor rotates to drive the input gear to rotate, the screw rod is driven to rotate sequentially through the first gear, the second gear, the third gear, the fourth gear and the input gear, different transmission ratios are achieved through the modulus of the gears, the installation is compact, the transmission effect is good, different gears can be replaced to form different transmission ratios, and the telescopic speed of the push rod is adjusted.
Drawings
Fig. 1 is a cross-sectional view of an electric putter in accordance with the present embodiment, which is used to illustrate the overall structure of the electric putter;
FIG. 2 is an exploded view of the outer tube after the electric push rod is pushed out;
FIG. 3 is a schematic view of a connection relationship between a special-shaped tube seat and an upper cover of the electric putter in this embodiment;
FIG. 4 is a schematic structural diagram of an upper cover of the power putter in accordance with the present embodiment;
FIG. 5 is a schematic structural view of a center tube of the electric putter in this embodiment;
FIG. 6 is an enlarged view of FIG. 1 at B;
FIG. 7 is an enlarged view taken at A in FIG. 1;
FIG. 8 is a perspective sectional view of a nut of the power putter in accordance with the present embodiment;
FIG. 9 is a schematic structural view of a sub-nut of the electric putter in this embodiment;
fig. 10 is an exploded schematic view of an installation relationship of an end cover, an outer tube, a guide sleeve, a wear-resistant sleeve and a nut in the electric push rod in the present embodiment;
fig. 11 is a sectional view at C of fig. 2.
Reference numerals: 1. an outer tube; 11. an end cap; 12. a guide sleeve; 13. a wear-resistant sleeve; 14. a limiting groove; 15. an upper end joint; 16. a lower end joint; 2. an inner tube; 3. a screw; 31. a bidirectional thrust ball bearing; 32. a bearing spacer; 33. a sealing head; 34. a seal ring; 4. a nut; 5. a drive member; 50. a motor; 51. a speed change gear set; 511. a bearing; 52. an output gear; 53. a first gear; 54. a second gear; 55. a third gear; 56. a fourth gear; 57. a fifth gear; 58. a sixth gear; 61. a lower cover; 62. an upper cover; 63. a special-shaped tube seat; 611. a first fixing hole; 612. a first fixing bolt; 613. a nut engaging portion; 614. fixing a screw cap; 621. a second fixing hole; 622. a second fixing screw hole; 623. a second fixing bolt; 631. mounting holes; 632. mounting a screw hole; 633. a third fixing bolt; 64. a bearing seat; 59. an input gear; 6. a base; 7. a main nut; 71. a first oil guide hole; 72. a second oil guide hole; 73. a third oil guide hole; 74. a vertical oil passage; 75. a horizontal oil passage; 76. an inclined surface; 77. an oil return passage; 78. an annular groove; 79. an axial slot; 8. a secondary nut; 81. a jack; 82. an oil storage chamber; 83. a communicating hole; 84. inner teeth; 85. a limiting bump; 86. a convex ring; 87. a rib; 88. a contact block; 91. a limit switch; 92. a wire slot; 93. and (4) a contact.
Detailed Description
The utility model provides an electronic flexible push rod, as shown in figure 1, includes base 6, outer tube 1, inner tube 2, screw rod 3, nut 4, driving piece 5 and end cover 11, and base 6 includes upper cover 62, lower cover 61, dysmorphism tube socket 63, and outer tube 1 one end is connected on dysmorphism tube socket 63, and the other end and end cover 11 fixed connection set up the end cover hole that supplies inner tube 2 to wear out on the end cover 11.
The end face, facing the nut 4, of the end cover 11 is provided with a guide sleeve 12, the inner wall of the guide sleeve 12 is provided with a wear-resistant sleeve 13, the wear-resistant sleeve 13 is sleeved outside the inner tube 2 and attached to the outer wall of the inner tube 2, and the wear-resistant sleeve 13 is made of POM plastic.
As shown in fig. 1 and 2, the lower end joint 16 is fixedly connected to the end surface of the lower cover 61 facing away from the upper cover 62, the lower cover 61, the upper cover 62 and the special pipe seat 63 are sequentially connected, a gear cavity is formed between the lower cover 61 and the upper cover 62, and a bearing cavity is formed between the upper cover 62 and the special pipe seat 63. Four groups of first fixing holes 611 penetrating through the lower cover 61, the upper cover 62 and the special-shaped tube seat 63 are formed in the lower cover 61, the upper cover 62 and the special-shaped tube seat 63, a first fixing bolt 612 penetrates through the first fixing holes 611, the first fixing bolt 612 penetrates through the lower cover 61 and penetrates out of the first fixing holes 611 of the special-shaped tube seat 63, a nut clamping portion 613 is arranged at the first fixing holes 611 of the special-shaped tube seat 63, a fixing screw cap 614 is embedded in the nut clamping portion 613, and the fixing screw cap 614 is in threaded connection with the first fixing bolt 612.
As shown in fig. 3 and 4, the end surface of the upper cover 62 facing the lower cover 61 is provided with a plurality of second fixing holes 621, the surface of the special-shaped tube seat 63 facing the upper cover 62 is provided with a second fixing screw hole 622 coaxial with the second fixing holes 621, a second fixing bolt 623 penetrates through the second fixing hole 621, and the second fixing bolt 623 is in threaded connection with the second fixing screw hole 622.
As shown in fig. 2 and 5, the end surface of the special-shaped tube base 63 facing the upper cover 62 is provided with an attachment hole 631, and the end of the outer tube 1 facing the special-shaped tube base 63 is provided with an attachment screw hole 632. A third fixing bolt 633 is arranged in the upper cover 62, and the third fixing bolt 633 passes through the mounting hole 631 and is screwed into the mounting screw hole 632.
As shown in fig. 1 and 2, the driving member 5 includes a motor 50 and a speed change gear set 51, the speed change gear set 51 includes an output gear 52, a first gear 53, a second gear 54, a third gear 55, a fourth gear 56 and an input gear 59, the input gear 59 is connected with the screw 3 to drive the screw 3 to rotate, the output gear 52 is connected with the output shaft of the motor 50, the first gear 53 and the second gear 54 are coaxially arranged, the third gear 55 and the fourth gear 56 are coaxially arranged, the first gear 53 is meshed with the output gear 52, the second gear 54 is meshed with the third gear 55, the fourth gear 56 is meshed with a fifth gear 57, and the sixth gear 58 is meshed with the input gear 59.
Two ends of the rotating shaft of the first gear 53, the second gear 54, the third gear 55, the fourth gear 56, the fifth gear 57 and the sixth gear 58 are respectively connected with the opposite end surfaces of the upper cover 62 and the lower cover 61 through bearings 511 in a rotating way.
As shown in fig. 4 and 6, a bearing seat 64 is arranged in a bearing cavity between the upper cover 62 and the special-shaped tube seat 63, a two-way thrust ball bearing 31 is mounted on the bearing seat 64, one end of the screw rod 3 passes through the two-way thrust ball bearing 31 and is coaxially fixed with the input gear 59, the two-way thrust ball bearing 31 is arranged in the bearing seat 64, and bearing gaskets 32 respectively abutted against the lower cover 61 and the screw rod 3 are arranged at two ends of the two-way thrust ball bearing 31.
As shown in fig. 7, the other end of the screw 3 extends to an end away from the upper cap 62 so as to penetrate into the outer tube 1.
As shown in fig. 7 and 8, the nut 4 includes a main nut 7 and an auxiliary nut 8 integrally injection-molded on the main nut 7, the main nut 7 is made of a copper nut 4, and the auxiliary nut 8 is made of a plastic material.
As shown in fig. 8 and 9, an end surface of the sub nut 8 facing the main nut 7 is provided with an insertion hole 81, an end portion of the main nut 7 facing the sub nut 8 is inserted into the insertion hole 81, a gap is left between the end surface of the main nut 7 and the bottom of the insertion hole 81 on the sub nut 8 to form an oil storage chamber 82, an end surface of the sub nut 8 facing away from the main nut 7 is provided with a communication hole 83 communicating with the oil storage chamber 82, and an inner thread 84 tightly engaged with the thread of the screw 3 is arranged in the communication hole 83.
As shown in fig. 7 and 8, the screw 3 penetrates through the communication hole 83 and then is in threaded connection with the main nut 7, the outer wall of the auxiliary nut 8 is provided with a plurality of limiting lugs 85, the inner wall of the outer tube 1 is provided with a plurality of limiting grooves 14, and the limiting lugs 85 are slidably arranged in the limiting grooves 14, so that the nut 4 is limited to rotate along the rotating shaft of the screw 3.
As shown in fig. 1 and 10, one end of the main nut 7 facing away from the sub nut 8 is screwed into the inner tube 2 in a direction opposite to a direction in which the main nut 7 is screwed into the screw 3. The end of the screw 3 remote from the upper cover 62 extends into the inner tube 2 after passing through the main nut 7. A sealing head 33 is fixed to the end of the screw 3. An annular sealing groove is formed in the sealing head 33, a sealing ring 34 is embedded in the sealing groove, and the sealing ring 34 is attached to the outer wall of the inner pipe 2 to form sealing.
As shown in fig. 8, a first oil guide hole 71 is opened on the end surface of the main nut 7 facing the auxiliary nut 8, a second oil guide hole 72 is opened on the inner wall of the main nut 7, a third oil guide hole 73 is opened on the end surface of the main nut 7 facing away from the auxiliary nut 8, and a vertical oil passage 74 communicating the first oil guide hole 71 and the third oil guide hole 73 and a horizontal oil passage 75 communicating the second oil guide hole 72 and the vertical oil passage 74 are opened in the main nut 7.
The first oil guide hole 71, the second oil guide hole 72, the third oil guide hole 73, the horizontal oil passage 75 and the vertical oil passage 74 are all provided with a plurality of oil guide holes and distributed along the circumferential direction of the main nut 7, the first oil guide hole 71, the second oil guide hole 72, the third oil guide hole 73, the horizontal oil passage 75 and the vertical oil passage 74 are arranged in a one-to-one correspondence manner, an inclined surface 76 is arranged between the end surface of the main nut 7 facing the auxiliary nut 8 and the inner wall of the main nut 7, and the first oil guide hole 71 is arranged on the inclined surface 76.
One of the vertical oil passages 74 extends in the radial direction of the main nut 7 and penetrates the outer wall of the main nut 7 to form an oil return passage 77.
As shown in fig. 11, a wire casing 92 extending along the length direction of the outer tube 1 is fixed on the special-shaped tube seat 63, a limit switch 91 is installed on the wire casing 92, a contact of the limit switch 91 is arranged upward, a contact block 88 is arranged on the outer wall of the auxiliary nut 8 in a protruding manner, the contact block 88 is located right above a contact 93 of the limit switch 91, and when the nut 4 moves towards the direction close to the upper cover 62 along the screw 3, the contact block 88 can contact the contact 93 of the limit switch 91, so that the motor 50 stops working.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims (9)

1. The utility model provides an electronic flexible push rod, includes outer tube (1), inner tube (2), screw rod (3), nut (4) and driving piece (5), and outer tube (1) both ends are provided with base (6) and end cover (11) respectively, screw rod (3) set up in outer tube (1), and one end and base (6) rotate to be connected, and the other end rotates with nut (4) to be connected, and inner tube (2) and screw rod (3) coaxial setting, inner tube (2) one end penetrate outer tube (1) and the cover is located outside screw rod (3) from end cover (11), nut (4) set up on inner tube (2), inner tube (2) and outer tube (1) joint on the rotation direction, and driving piece (5) set up on base (6) and are connected with screw rod (3) and rotate in order to drive screw rod (3), its characterized in that: be provided with limit switch (91) on base (6), the outer wall protrusion of nut (4) is provided with and supports touch multitouch (88), support touch multitouch (88) are located limit switch (91) contact (93) directly over.
2. The electric telescopic rod as claimed in claim 1, wherein: be provided with wire casing (92) on base (6), wire casing (92) extend along outer tube (1) length direction, limit switch (91) set up in wire casing (92).
3. An electric telescopic rod as claimed in claim 2, wherein: the utility model discloses a nut, including outer tube (1), nut (4), inner tube (2), outer tube (1) and spacing groove (14), the spacing groove (14) that a plurality of edge outer tube (1) circumference distributes are seted up to outer tube (1) inner wall, nut (4) outer wall is provided with along radial protrusion and corresponds with spacing groove (14) and slide in spacing groove (14) along outer tube (1) circumference spacing lug (85), and inner tube (2) and outer tube (1) realize the joint in the direction of rotation through spacing groove (14) and spacing lug (85).
4. The electric telescopic rod as claimed in claim 1, wherein: nut (4) include main nut (7) and components of a whole that can function independently set up vice nut (8) on main nut (7), jack (81) have been seted up towards the terminal surface of main nut (7) to vice nut (8), main nut (7) are towards the tip of vice nut (8) and insert in jack (81) and leave the space between terminal surface and jack (81) bottom surface, form oil storage chamber (82), intercommunicating pore (83) have been seted up to the terminal surface of main nut (7) back to vice nut (8), intercommunicating pore (83) inner wall is equipped with interior tooth (84), screw rod (3) insert in intercommunicating pore (83) and with main nut (7) threaded connection, screw rod (3) and interior tooth (84) threaded connection and closely cooperate.
5. An electric telescopic rod as claimed in claim 4, wherein: the end face, facing the auxiliary nut (8), of the main nut (7) is provided with a first oil guide hole (71), the inner wall of the main nut (7) is provided with a second oil guide hole (72), the end face, back to the auxiliary nut (8), of the main nut (7) is provided with a third oil guide hole (73), and a vertical oil duct (74) and a horizontal oil duct (75) are arranged in the main nut (7), wherein the vertical oil duct (74) is communicated with the first oil guide hole (71) and the third oil guide hole (73), and the horizontal oil duct (75) is communicated with the second oil guide hole (72) and the vertical oil duct (74).
6. An electric telescopic rod as claimed in claim 5, wherein: the first oil guide hole (71), the second oil guide hole (72), the third oil guide hole (73), the horizontal oil passage (75) and the vertical oil passage (74) are all provided with a plurality of oil guide holes and distributed along the circumferential direction of the main nut (7), the first oil guide hole (71), the second oil guide hole (72), the third oil guide hole (73), the horizontal oil passage (75) and the vertical oil passage (74) are arranged in a one-to-one correspondence mode, an inclined surface (76) is arranged between the end face, facing the auxiliary nut (8), of the main nut (7) and the inner wall of the main nut (7), and the first oil guide hole (71) is arranged on the inclined surface (76).
7. An electric telescopic rod as claimed in claim 6, wherein: one of the vertical oil passages (74) extends along the radial direction of the main nut (7) and penetrates the outer wall of the main nut (7) to form an oil return passage (77).
8. An electric telescopic rod as claimed in claim 7, wherein: the end part of the screw rod (3) far away from the base (6) is provided with a sealing head (33), and a sealing ring (34) attached to the outer wall of the inner pipe (2) is arranged on the sealing head (33).
9. The electric telescopic rod as claimed in claim 1, wherein: the driving piece (5) comprises a motor (50) and a speed change gear set (51), the speed change gear set (51) comprises an output gear (52), a first gear (53), a second gear (54), a third gear (55), a fourth gear (56) and an input gear (59), the input gear (59) is connected with the screw (3) to drive the screw (3) to rotate, the output gear (52) is connected with an output shaft of the motor (50), the first gear (53) and the second gear (54) are coaxially arranged, the third gear (55) and the fourth gear (56) are coaxially arranged, the first gear (53) is meshed with the output gear (52), the second gear (54) is meshed with the third gear (55), and the fourth gear (56) is meshed with the input gear (59).
CN201921485348.9U 2019-09-06 2019-09-06 Electric telescopic push rod Active CN210661249U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921485348.9U CN210661249U (en) 2019-09-06 2019-09-06 Electric telescopic push rod

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921485348.9U CN210661249U (en) 2019-09-06 2019-09-06 Electric telescopic push rod

Publications (1)

Publication Number Publication Date
CN210661249U true CN210661249U (en) 2020-06-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921485348.9U Active CN210661249U (en) 2019-09-06 2019-09-06 Electric telescopic push rod

Country Status (1)

Country Link
CN (1) CN210661249U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112994346A (en) * 2021-05-17 2021-06-18 常州市凯迪电器股份有限公司 Actuator
CN115342179A (en) * 2022-06-28 2022-11-15 杭州华一强实业有限公司 Electric telescopic joint rod

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112994346A (en) * 2021-05-17 2021-06-18 常州市凯迪电器股份有限公司 Actuator
CN115342179A (en) * 2022-06-28 2022-11-15 杭州华一强实业有限公司 Electric telescopic joint rod

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