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CN-224214646-U - Multistage electric telescopic rod

CN224214646UCN 224214646 UCN224214646 UCN 224214646UCN-224214646-U

Abstract

The utility model discloses a multi-stage electric telescopic rod, which realizes that a one-stage screw rod drives a multi-stage nut to drive, the length of an n-stage telescopic rod is close to n times of that of the telescopic rod when the n-stage telescopic rod stretches out, the middle of the telescopic rod can stop at any position, the available stroke is large, only the one-stage screw rod is made of light materials, the whole weight is light and the volume is small, the number of stages can be increased or decreased according to design use requirements, a guide piece guiding mode is adopted, smooth transition of the screw nut meshing and separating process is realized, hook locking is adopted between the 2 nd stage to the n-1 stage and the upper stage, the sequential stretching out of each stage rod is realized, the condition that the upper stage does not stretch in place to drive the lower stage to stretch out is avoided, the bottoms of the 2 nd stage to the n stage rod are made of wear-resistant materials, the telescopic rod is fully lubricated and clung to the inner wall of the upper stage rod end piece, the 1 st stage rod top end piece is made of wear-resistant materials, the telescopic rod is fully lubricated and clung to the outer wall of the lower stage rod, and the whole telescopic rod can bear large radial load, and the shaking and the deformation is small.

Inventors

  • BU XUYANG

Assignees

  • 深圳市沛纳海新材料有限公司

Dates

Publication Date
20260508
Application Date
20250710

Claims (6)

  1. 1. The multistage electric telescopic rod is characterized by comprising a fixed seat (1), wherein a 1 st stage rod (2) is fixedly installed on the fixed seat (1), a 2 nd stage rod (3) -n stage rod is slidably installed on the inner wall of the 1 st stage rod (2), n is a natural number, rod top end pieces (8) are installed on the top sides of the 1 st stage rod (2) to n-1 stage rods, rod bottom end pieces (5) are installed on the bottom sides of the 2 nd stage rod (3) -n stage rods, nuts (6) are fixedly installed on the bottom sides of the rod bottom end pieces (5), guide pieces (7) are fixedly installed on the bottom sides of the nuts (6), round table holes are formed in the bottom sides of the guide pieces (7), the bottom end diameters are larger than the upper end diameters, a reciprocating screw rod (4) is installed in the fixed seat (1) in a rotating mode through a bearing, a distance from the reciprocating screw rod (4) to the fixed seat (1) is smooth, and the 2 nd stage rod (3) is round and the round table is provided with a round table hole The nuts (6) on the n-level rods are screwed on the reciprocating screw (4), and the inner wall of the guide piece (7) is contacted with the top end of the reciprocating screw (4).
  2. 2. The multistage electric telescopic rod according to claim 1, wherein a speed reduction housing (12) is fixedly arranged on the bottom side of the fixed seat (1), a transmission gear (15) is rotatably arranged on the inner walls of the two sides of the speed reduction housing (12) through a bearing, a driven gear (16) is meshed on one side of the transmission gear (15), the driven gear (16) is sleeved on the bottom side of the reciprocating screw rod (4), and the bottom end of the reciprocating screw rod (4) is rotatably arranged on the inner wall of the bottom side of the speed reduction housing (12) through a bearing.
  3. 3. The multistage electric telescopic rod according to claim 2, wherein one side of the speed reduction housing (12) is fixedly provided with a servo motor (13) through a bolt, the bottom end of an output shaft of the servo motor (13) is arranged on the inner wall of the bottom side of the speed reduction housing (12) through a bearing, the output shaft of the servo motor (13) is sleeved with a driving gear (14), and the driving gear (14) is meshed with a transmission gear (15).
  4. 4. A multistage electric telescopic rod according to claim 1, wherein a plurality of said rod top end members (8) are each slidably provided with a stud hook lock (9), said stud hook lock (9) being of a transverse L-shape, said 1 st stage rods (2) -n- The top sides of the rod top end pieces (8) of the level 2 rods are fixedly provided with right trapezoid protrusions (10), and the hook ends of the stud hook locks (9) are contacted with the protruding ends of the right trapezoid protrusions (10).
  5. 5. A multistage electric telescopic rod according to claim 4, wherein the upper ends of a plurality of said stud hook locks (9) are slidably mounted on the 2 nd stage rods (3) -n- And on the rod top end pieces (8) on the level 1 rod, inclined planes are arranged at the upper ends of a plurality of rod bottom end pieces (5), and the inclined planes of the rod bottom end pieces (5) are contacted with the smooth ends of the pin hook locks (9).
  6. 6. A multistage electric telescopic rod according to claim 4, wherein a pin spring (11) is fixedly mounted on the rod top end piece (8), and the other end of the pin spring (11) is fixedly mounted on one side of a pin hook lock (9).

Description

Multistage electric telescopic rod Technical Field The utility model relates to the technical field of electric telescopic rods, in particular to a multistage electric telescopic rod. Background The existing multistage telescopic mechanism is generally divided into: 1. The manual operation is that no mechanical linkage exists between each stage, and the relative expansion and locking limit of each stage are manually operated. 2. The electric type is 2-level or 3-level expansion and contraction, the multistage expansion and contraction is realized by mechanisms such as a screw rod nut, a gear rack, a chain wheel chain or a pulley rope set, and the like, and the mechanism is driven by a motor during operation. When the hydraulic type hydraulic cylinder is in operation, hydraulic oil is pumped into/out of the hydraulic cylinder by a high-pressure oil pump to realize expansion and contraction, and synchronous/linkage between all stages is realized by mechanisms such as a chain wheel chain, a pulley rope set and the like, or locking between the cylinder and all stages is realized by structures such as a hydraulic pin and the like. The existing multi-stage telescopic mechanism has the problems that 1, the whole use process is very laborious, tedious and complex as all stages are required to be manually operated and have no linkage. And the two positions of the expansion and retraction are limited between the stages, so that the expansion and retraction length is difficult to adjust according to the needs. The number of the telescopic stages is generally not more than three, and each stage is driven by a screw-nut, a gear rack, a chain wheel, a chain or a pulley rope set and other complex mechanisms. The general recovery length is big, and total effective stroke is short, and the structure is complicated, and is with high costs, and the reliability is not enough, and radial load capacity is weak. The hydraulic system needs a whole hydraulic system, has complex structure, high cost, huge volume and heavy whole body, and cannot meet most daily use requirements. Therefore, a multi-stage electric telescopic rod is proposed. Disclosure of utility model The utility model aims to provide a multi-stage electric telescopic rod, which solves the problems in the prior art. The multistage electric telescopic rod comprises a fixed seat, a1 st stage rod is fixedly arranged on the fixed seat, a2 nd stage rod-n stage rod is slidably arranged on the inner wall of the 1 st stage rod, n is a natural number, rod top end pieces are arranged on the top sides of the 1 st stage rod to the n-1 stage rod, rod bottom end pieces are arranged on the bottom sides of the 2 nd stage rod-n stage rod, nuts are fixedly arranged on the bottom sides of the rod bottom end pieces, guide pieces are fixedly arranged on the bottom sides of the nuts, round platform holes are formed in the bottom sides of the guide pieces, the diameter of the bottom ends is larger than that of the upper ends, a reciprocating screw rod is rotatably arranged in the fixed seat through a bearing, a distance between the reciprocating screw rod and the fixed seat is smooth, the nuts on the 2 nd stage rod-n stage rod are all screwed on the reciprocating screw rod, and the inner wall of the guide piece is in contact with the top end of the reciprocating screw rod. Preferably, the bottom side of fixing base is gone up fixed mounting and is had the speed reduction shell, and through the bearing rotation on the both sides inner wall of speed reduction shell install drive gear, the meshing has driven gear on one side of drive gear, and driven gear cup joints on the bottom side of reciprocating screw, the bottom of reciprocating screw is installed on the bottom side inner wall of 12 through the bearing rotation. Preferably, one side of the speed reduction housing is fixedly provided with a servo motor through a bolt, the bottom end of an output shaft of the servo motor is arranged on the inner wall of the bottom side of the speed reduction housing through a bearing, a driving gear is sleeved on the output shaft of the servo motor, and the driving gear is meshed with the transmission gear. Preferably, a plurality of pole top end pieces are all slidably mounted with a pin hook lock, the pin hook lock is in a transverse L shape, right trapezoid protrusions are fixedly mounted on the top sides of the pole top end pieces of the 1 st pole-n-2 nd poles, and the hook ends of the pin hook lock are contacted with the protruding ends of the right trapezoid protrusions. Preferably, the upper ends of the plurality of pin hook locks are respectively and slidably arranged on the rod top end pieces on the 2 nd-n-1 st rod, the upper ends of the plurality of rod bottom end pieces are respectively provided with inclined surfaces, and the inclined surfaces of the rod bottom end pieces are contacted with the smooth ends of the pin hook locks. Preferably, a pin spring is fixedly installed on the rod top end