CN211533496U

CN211533496U - Overhead thread lifting rotation-stopping lifting rod

Info

Publication number: CN211533496U
Application number: CN201921489265.7U
Authority: CN
Inventors: 王强; 齐维新; 杨严
Original assignee: Yueqiang Gas Spring Manufacturing Co ltd
Current assignee: Yueqiang Gas Spring Manufacturing Co ltd
Priority date: 2019-09-09
Filing date: 2019-09-09
Publication date: 2020-09-22
Anticipated expiration: 2029-09-09

Abstract

The utility model discloses an overhead screw thread lift spline lifter, including conical head inner tube, upper limit ring, nut cover, terminal surface gasket, uide bushing, stopping ring, bead sleeve pipe, outer riser, lower limit ring, conical head inner tube impress bead sleeve pipe and pass through interference fit fastening connection, process threaded on bead of bead sleeve pipe, the nut closes with this screw soon, the uide bushing impresses the main aspects of outer riser and passes through interference fit fastening connection, the hole of uide bushing and the cylindrical part clearance fit of bead sleeve pipe; the inner hole of the guide sleeve is provided with a tooth groove. The upper limiting ring and the lower limiting ring are buckled in the ring groove on the conical head sleeve through the inner convex ring. The nut is arranged in the nut sleeve, the nut sleeve is arranged outside the anti-return ring, and the anti-return ring is sleeved outside the outer vertical pipe. The utility model discloses owing to adopt mechanical type screw thread lifting adjusting, consequently abandoned the latent risk that the high-pressure gas of original high-pressure gas pressure stick brought completely.

Description

Overhead thread lifting rotation-stopping lifting rod

Technical Field

The utility model relates to a chair technical field specifically is an overhead screw thread goes up and down to spline lifter.

Background

The swivel chair in the market at present mostly adopts a high-pressure air pressure rod to realize the lifting adjustment and the rotation function of the chair, the basic principle is that high-pressure nitrogen is filled in a basic piston type cylinder, a closed loop is adopted to communicate two ends of a piston, a stop control valve is arranged in the loop and used for controlling the on-off of the loop, when the stop valve is opened, the air cavity pressures on two sides of the piston are equal, but one side with a piston rod occupies a part of the area of the piston due to the fact that the piston rod occupies a part of the area of the piston, the total pressure on the piston is smaller than the total pressure on the side without the piston rod, the piston is driven to move towards the side with the piston rod by the pressure difference, and finally the chair is lifted, and when the chair has the downward. The chair is convenient and flexible to lift. However, with the change of domestic economy and living standards, people are in the initiative for the next generation of cares and safety, and do not want to use the high-pressure gas pressure rod when the child seat is lifted, and worry about the danger caused by the leakage of high-pressure gas, so that a great proportion of people hope to use a seat lifting mechanism without high-pressure gas on the child seat. In order to meet the market demand, the invention discloses a novel food processing device.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an use screw thread to go up and down can not change pivoted lifter to solve the latent safe risk that the current atmospheric pressure stick technique of proposing brought in the above-mentioned background art, satisfy the trend demand problem in market.

In order to achieve the above object, the utility model provides a following technical scheme: an upper threaded lifting rotation-stopping lifting rod comprises a conical head inner tube, an upper limiting ring, a nut sleeve, an end face gasket, a guide sleeve, a retraction-stopping ring, a convex rib sleeve, an outer vertical tube and a lower limiting ring, wherein the conical head inner tube is pressed into the convex rib sleeve and is fixedly connected through interference fit, threads are processed on convex ribs of the convex rib sleeve, the nut is screwed with the threads, the convex rib sleeve and the conical head inner tube can generate axial lifting movement by rotating the nut, the large end of the guide sleeve pressed into the outer vertical tube is fixedly connected through interference fit, and an inner hole of the guide sleeve is in clearance fit with a cylindrical part of the convex rib sleeve and can slide; the guide sleeve is characterized in that a tooth groove is formed in an inner hole of the guide sleeve, the number of the tooth grooves is the same as that of ribs on the rib sleeve, and the rib and the tooth groove are buckled, so that the rib sleeve cannot rotate and can only lift and slide along the axial direction. The number of the convex ribs and the tooth grooves is multiple. The upper limiting ring and the lower limiting ring are buckled in the ring groove on the inner pipe of the cone head through the inner convex ring, and the limiting effect on the lifting stroke is achieved. The nut is arranged in the nut sleeve, the nut sleeve is arranged outside the anti-return ring, and the anti-return ring is sleeved outside the outer vertical pipe. The end face gasket is arranged between the nut and the end face of the outer vertical pipe.

Preferably, the anti-return ring is fixedly connected with the outer vertical pipe through rivet anchoring.

Preferably, the nut is pressed into the nut sleeve and connected in a transition fit mode. The nut can be rotated by rotating the nut sleeve.

Preferably, the nut sleeve is pressed into and snapped onto the outer circle of the retaining ring by means of a raised annular ring on the inner surface, ensuring that the nut does not come loose when subjected to a directed force.

Preferably, a face washer is provided between the nut and the outer riser face for increased contact stability.

Preferably, the conical head of the conical head inner pipe is connected with the bottom of the chair seat, and the conical head part at the lower part of the outer vertical pipe is connected with the chassis seat of the chair.

Advantageous effects

The utility model provides a top-mounted screw thread lift spline lifter possesses following beneficial effect: the product is used on a seat, the nut is driven by the nut sleeve, and then the lifting of the seat is adjusted by driving the screw thread, so that the required height is reached. The ridge of the convex rib sleeve is buckled with the tooth groove of the guide sleeve, so that the functions of only lifting and non-rotation are achieved. The conical head inner pipe (28mm inner pipe) is pressed into the convex rib sleeve and is integrated through interference fit. The guide sleeve is pressed into the outer vertical pipe in an interference fit mode to form a whole, and tooth grooves corresponding to the convex edges of the convex edge sleeve are formed in the guide sleeve, so that the guide sleeve can only lift and cannot rotate. The conical head of the conical head inner pipe is connected with the bottom of the chair seat, the conical head part on the outer vertical pipe is connected with the chair chassis seat, and the chair can only lift and can not rotate due to the interaction of the convex edge sleeve and the guide sleeve. When the chair is used, the nut sleeve is rotated by hands to drive the nut to rotate, and the conical head inner pipe is driven to move up and down through thread transmission, so that the height of the chair is adjusted. The utility model discloses owing to adopt mechanical type screw thread lifting adjusting, consequently abandoned the potential risk that the high-pressure gas of original high-pressure gas pressure stick brought completely for the user can use by peace of mind.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

In the figure: the device comprises a conical head inner pipe (1), an upper limiting ring (2), a nut (3), a nut sleeve (4), an end face gasket (5), a guide sleeve (6), a stop ring (7), a ribbed sleeve (8), an outer vertical pipe (9) and a lower limiting ring (10).

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, the present invention provides a technical solution: an overhead thread lifting rotation-stopping lifting rod comprises a conical head inner tube 1, an upper limiting ring 2, a nut 3, a nut sleeve 4, an end face gasket 5, a guide sleeve 6, a stopping ring 7, a convex edge sleeve 8, an outer vertical tube 9, a lower limiting ring 10 and the like.

Further, the conical head inner tube 1 is tightly connected with the rib sleeve 8 in an interference fit manner.

Furthermore, the rib of the rib sleeve 8 is provided with a thread, and the thread is matched with the thread of the nut 3. The number of ribs may be 2, 3, 4, etc., and more.

Further, the guide sleeve 6 is tightly connected with the outer vertical pipe 9 in an interference fit manner. The inner hole of the guide sleeve 6 is provided with tooth grooves, and the number of the tooth grooves is the same as that of the ridges on the ribbed sleeve 8.

Furthermore, the inner hole and the tooth groove of the convex rib sleeve 8 and the guide sleeve 6 form clearance fit and can axially slide mutually, but the convex rib sleeve 8 cannot rotate the guide sleeve 6 mutually due to buckling of the convex rib and the tooth groove, and finally the chair cannot rotate and only can be lifted.

Further, the check ring 7 is riveted in place on the outer circumference of the outer riser 9 by rivets.

Furthermore, the thread of the nut 3 is screwed on the rib thread of the rib sleeve 8, and the rib sleeve 8 and the cone head inner tube 1 can move axially together by rotating the nut 3.

Further, the end face gasket 5 is arranged between the nut 3 and the end face of the outer stand pipe 9 to increase the contact stability of the nut and the outer stand pipe.

Furthermore, the nut sleeve 4 is sleeved outside the nut 3, so that the manual rotation operation is facilitated, and the appearance is attractive. Meanwhile, the inner cylindrical surface of the nut sleeve 4 is provided with a circular ring bulge, and the nut sleeve 4 is buckled on the anti-return ring 7 by the circular ring bulge, so that the nut 3 is ensured not to be loosened when being subjected to directional force.

Furthermore, the inner surfaces of the upper limiting ring 2 and the lower limiting ring 10 are provided with a circular ring bulge, and the circular ring bulge is buckled in the circular grooves at the upper end and the lower end of the conical head inner pipe 1 to play a role in limiting the lifting stroke.

To this end, the utility model relates to an overhead screw thread goes up and down to spline lifter structure and accomplishes promptly.

The working principle is as follows:

the product is used on a seat, and the ascending and descending of the seat are adjusted through threads to reach the required height. The functions of only lifting and non-rotating can be achieved through the matching of the inner hole of the convex rib sleeve 8 and the guide sleeve 6 and the tooth grooves. The conical head inner pipe 1 is pressed into the convex edge sleeve 8 and is fixedly connected into a whole through interference fit. The guide sleeve 6 is pressed into the outer vertical pipe 9 and is fastened and connected into a whole through interference fit. The conical head of the conical head inner pipe 1 is connected with the bottom of the chair seat, and the conical head part at the lower part of the outer vertical pipe 9 is connected with the chassis seat of the chair. When the nut sleeve 4 is rotated by hand to drive the nut 3 to rotate, the whole formed by the convex rib sleeve 8 and the conical head inner tube 1 can lift along the axial direction, so that the height of the chair is changed. The upper and lower limit rings only limit the upper and lower limit positions of the axial movement, namely the stroke limit. The anti-back ring 7 is only used to limit the nut sleeve 4 from loosening upwards during use.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An overhead thread lifting rotation-stopping lifting rod comprises a conical head inner tube (1), an upper limiting ring (2), a nut (3), a nut sleeve (4), an end face gasket (5), a guide sleeve (6), a return-stopping ring (7), a bead sleeve (8), an outer vertical tube (9) and a lower limiting ring (10), and is characterized in that the conical head inner tube (1) is pressed into the bead sleeve (8) and is fixedly connected through interference fit, threads are processed on beads of the bead sleeve (8), the nut (3) is screwed with the threads, the guide sleeve (6) is pressed into the large end of the outer vertical tube (9) and is fixedly connected through interference fit, the inner hole of the guide sleeve (6) is in clearance fit with the cylindrical part of the bead sleeve (8), tooth grooves are formed in the inner hole of the guide sleeve (6), the number of the tooth grooves is the same as that of the ridge sleeve (8), and the beads are buckled, go up spacing ring (2) and spacing ring (10) down and detain in the annular on conical head inner tube (1) through interior convex ring knot, nut (3) set up in nut cover (4), nut cover (4) set up the outside at anti-backing ring (7), anti-backing ring (7) cover is established in the outside of outer riser (9), end gasket (5) set up between nut (3) and outer riser (9) terminal surface.

2. The overhead screw thread lifting rotation-stopping lifting rod as claimed in claim 1, wherein the anti-backing ring (7) is fixedly connected with the outer stand pipe (9) by rivet anchoring.

3. The overhead threaded lifting rotation-stopping lifting rod as claimed in claim 1, wherein the nut (3) is pressed into the nut sleeve (4) and is connected by transition fit.

4. The overhead screw thread lifting rotation-stopping lifting rod as claimed in claim 1, wherein the nut sleeve (4) is pressed and fastened to the outer circle of the stopping ring (7) by a raised circular ring on the inner surface.