CN111395851A

CN111395851A - Lifting mast

Info

Publication number: CN111395851A
Application number: CN202010261197.XA
Authority: CN
Inventors: 张忠东; 周小军; 周庆
Original assignee: Wuhan Xingmi Space Information Technology Co ltd
Current assignee: Wuhan Xingmi Space Information Technology Co ltd
Priority date: 2020-04-03
Filing date: 2020-04-03
Publication date: 2020-07-10

Abstract

The invention relates to the technical field of lifting devices, in particular to a lifting mast. The lifting mast comprises a screw, a nut sleeve, a rod body seat and a first buffer piece, wherein the nut sleeve is in threaded connection with the screw and is provided with a first surface and a second surface which are vertical to the axis of the screw, the first surface is positioned above the second surface, the rod body seat is arranged on the screw and is provided with a cavity, the nut sleeve is positioned in the cavity, and the first buffer piece is positioned in the cavity and is abutted between the inner wall of the cavity and the first surface. When the carrier is lifted, the screw rod is rotated, the nut sleeve is lifted along the axial direction of the screw rod to drive the rod body seat to lift, and therefore the carrier is lifted to a specified position. Through setting up first bolster, prevent the first surface and the body of rod seat direct contact of nut cover on the one hand, on the other hand is at the in-process that rises, and the impact force between nut cover and the body of rod seat is cushioned by first bolster, has effectively avoided the wearing and tearing of nut cover and body of rod seat to can also reduce the noise.

Description

Lifting mast

Technical Field

The invention relates to the technical field of lifting devices, in particular to a lifting mast.

Background

The lifting mast is a lifting device which is powered by compressed air, electric power, manpower and the like to lift or lower a carrier to a certain height, and is widely applied to various industries such as fire fighting, security protection, weather, communication, military and the like. The electric lifting mast is more and more favored compared with a manual lifting mast and a pneumatic lifting mast because the electric lifting mast can automatically lift or lower the carrier and does not need to consider the sealing problem.

The electric lift mast generally includes a threaded rod, a nut sleeve, and a rod body seat. When the carrier is lifted or lowered, the screw rod is rotated, and the nut sleeve is lifted or lowered along the axial direction of the screw rod to drive the rod body seat to be lifted or lowered, so that the carrier is lifted or lowered to a specified position. However, in the lifting process, because a certain impact force exists between the nut sleeve and the rod body seat, the nut sleeve and the rod body seat are easily abraded, and a large noise is generated.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the utility model provides a lifting mast, aims at solving current lifting mast and in the process of rising, because there is certain impact force between nut cover and the body of rod seat, not only cause the wearing and tearing of nut cover and body of rod seat easily to still can produce the problem of great noise.

In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides a lifting mast, includes screw rod, nut cover, body of rod seat and first bolster, the nut cover with screw rod threaded connection, and have with the axis vertically first surface and the second surface of screw rod, just the first surface is located the top on second surface, body of rod seat cover is located the screw rod to be equipped with the cavity, the nut cover is located in the cavity, first bolster is located the cavity, and support tightly in the inner wall of cavity with between the first surface.

Optionally, the lifting mast further comprises a second buffer member located in the cavity, and the second buffer member abuts against between the inner wall of the cavity and the second surface.

Optionally, the first buffer member and the second buffer member are both flat opposite-vertex wave springs.

Optionally, the lifting mast further comprises a clamp spring, an annular groove is formed in the inner wall of the cavity, the clamp spring is clamped into the groove, and the second buffer member abuts against the inner wall of the cavity through the clamp spring.

Optionally, in the axial direction of the screw, the height of the groove is greater than the thickness of the clamp spring.

Optionally, the nut sleeve has a radially extending flange having the first surface and the second surface.

Optionally, the flange is provided with a first vent hole penetrating through the first surface and the second surface, the rod body seat is provided with a second vent hole, and the first vent hole is communicated with the outside through the second vent hole.

Optionally, a side surface of the nut sleeve is clearance fit with a side wall of the cavity.

Optionally, the nut sleeves and the rod body seat are provided in plurality, the nut sleeves are sequentially arranged on the screw rod, and the rod body seat and the nut sleeves are arranged in one-to-one correspondence.

The embodiment of the invention has the following beneficial effects: when the carrier ascends, the screw rod is rotated, the nut sleeve ascends along the axial direction of the screw rod and compresses the first buffer piece, the first buffer piece provides an upward force for the rod body seat to drive the rod body seat to ascend, and therefore the carrier is lifted to a specified position; when the carrier descends, the screw rod is rotated reversely, the nut sleeve descends along the axial direction of the screw rod, and the rod body seat descends under the action of gravity, so that the carrier descends to a specified position. Through setting up first bolster, prevent the first surface and the body of rod seat direct contact of nut cover on the one hand, on the other hand is at the in-process that rises, and the impact force between nut cover and the body of rod seat is cushioned by first bolster, has effectively avoided the wearing and tearing of nut cover and body of rod seat to can also reduce the noise.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Wherein:

FIG. 1 is a schematic view of a construction of a lifting mast according to an embodiment of the invention;

FIG. 2 is a cross-sectional view of the lift mast of FIG. 1 taken along A-A;

FIG. 3 is an enlarged view at B in FIG. 2;

FIG. 4 is an enlarged view at C of FIG. 3;

FIG. 5 is a schematic structural view of the first or second buffer member shown in FIG. 4;

FIG. 6 is a cross-sectional view of the shank mount of FIG. 4;

FIG. 7 is a cross-sectional view of the nut shell of FIG. 4.

Description of reference numerals:

10. a screw;

20. a nut sleeve; 21. a flange; 211. a first surface; 212. a second surface; 213. a first vent hole;

30. a lever body seat; 31. a cavity; 311. a groove; 32. a second vent hole;

40. a first buffer member;

50. a second buffer member;

60. and a clamp spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

An embodiment of the present invention provides a lifting mast, as shown in fig. 1 to 7, the lifting mast includes a screw 10, a nut sleeve 20, a rod base 30 and a first buffer 40, the nut sleeve 20 is in threaded connection with the screw 10, and has a first surface 211 and a second surface 212 perpendicular to an axis of the screw 10, the first surface 211 is located above the second surface 212, the rod base 30 is sleeved on the screw 10 and has a cavity 31, the nut sleeve 20 is located in the cavity 31, and the first buffer 40 is located in the cavity 31 and abuts against between an inner wall of the cavity 31 and the first surface 211.

When the carrier ascends, the screw rod 10 is rotated, the nut sleeve 20 ascends along the axial direction of the screw rod 10 and compresses the first buffer member 40, and the first buffer member 40 applies an upward force to the rod body seat 30 to drive the rod body seat 30 to ascend, so that the carrier is lifted to a specified position; when descending, the screw 10 is rotated reversely, the nut sleeve 20 descends along the axial direction of the screw 10, and the rod body seat 30 descends under the action of gravity, so that the carrier descends to a specified position. Through setting up first bolster 40, prevent on the one hand the first surface 211 of nut cover 20 and body seat 30 direct contact, on the other hand is in the lift-up in-process, and the impact force between nut cover 20 and the body seat 30 is cushioned by first bolster 40, has effectively avoided the wearing and tearing of nut cover 20 and body seat 30 to can also reduce the noise.

In this embodiment, as shown in fig. 4, the lifting mast further includes a second buffer member 50 located in the cavity 31, and the second buffer member 50 abuts between the inner wall of the cavity 31 and the second surface 212. When the carrier descends, the screw rod 10 is rotated reversely, the nut sleeve 20 descends along the axial direction of the screw rod 10 and compresses the second buffer member 50, the second buffer member 50 provides a downward force for the rod body seat 30, and the rod body seat 30 descends under the action of gravity and elasticity, so that the carrier descends to a specified position. Through setting up second bolster 50, in the descending process, the impact force between nut cover 20 and the body of rod seat 30 is cushioned by second bolster 50, has effectively avoided the wearing and tearing of nut cover 20 and body of rod seat 30 to can also reduce the noise.

It should be noted that in the present embodiment, as shown in fig. 5, the first cushion member 40 and the second cushion member 50 are flat opposite wave springs. Compare in other kinds of springs, because dull and stereotyped opposite vertex wave spring has the characteristics that the rigidity scope is big, the impact force between reduction nut cover 20 and the body of rod seat 30 that not only can be better to can also reduce the shake, it is more steady when making the body of rod seat 30 go up and down, guarantee good shock attenuation, buffering effect. In addition, as the flat opposite-top wave spring has the characteristic of small assembling space, the first buffer member 40 and the second buffer member 50 can be respectively installed between the inner wall of the cavity 31 and the first surface 211 and between the inner wall of the cavity 31 and the second surface 212 under the condition that the size of the rod body seat 30 is not changed, so that the assembly is convenient, and the whole lifting mast is more compact in structure. Of course, in other embodiments, the first cushion member 40 and the second cushion member 50 may be both ordinary coil springs.

In this embodiment, as shown in fig. 4 and 6, the lifting mast further includes a clamp spring 60, an annular groove 311 is formed in the inner wall of the cavity 31, the clamp spring 60 is clamped in the groove 311, and the second buffer member 50 abuts against the inner wall of the cavity 31 through the clamp spring 60. During installation, the rod body seat 30, the first buffer member 40, the nut sleeve 20 and the second buffer member 50 are sequentially installed on the screw rod 10, and then the clamp spring 60 is clamped into the annular groove 311 through the clamp spring clamp. Through setting up jump ring 60 to installation second bolster 50 for second bolster 50 supports tightly in the inner wall of cavity 31 through jump ring 60, avoids the decline in-process to arouse the damage of nut cover 20 and body of rod seat 30, has effectively reduced the noise. Moreover, by arranging the clamp spring 60, the axial fixing effect on the rod body seat 30 can be achieved, the rod body seat 30 is prevented from axially moving, and the nut sleeve 20 is driven to stably rise or fall along the axial direction of the screw rod 10 when rising or falling. In addition, during installation, the clamp spring 60 is only required to be clamped into the groove 311, and the installation is simple and convenient. Of course, in other embodiments, the rod body seat 30 may include two seat bodies disposed on the left and right sides, and when the rod body seat is installed, the first buffer member 40, the nut sleeve 20, and the second buffer member 50 are sequentially installed on the screw rod 10, and then the two seat bodies of the rod body seat 30 are connected and fixed.

Further, in the present embodiment, as shown in fig. 4 and 6, in the axial direction of the screw 10, the height of the groove 311 is greater than the thickness of the circlip 60. During installation, the groove 311 reserves enough installation space for the clamp spring 60, so that the clamp spring 60 can be conveniently installed in the groove 311, and the position of the clamp spring 60 can be finely adjusted according to actual needs. In addition, in the descending process, because the contact area between the clamp spring 60 and the groove 311 is small, the impact force between the nut sleeve 20 and the rod body seat 30 is further relieved, and the noise in the descending process is reduced.

In the present embodiment, as shown in fig. 4 and 7, the nut case 20 has a flange 21 extending in the radial direction, and the flange 21 has a first surface 211 and a second surface 212. By providing the flange 21, a mounting position is provided for the first buffering member 40 and the second buffering member 50, such that the first buffering member 40 abuts against the first surface 211 of the nut sleeve 20, and the second buffering member 50 abuts against the second surface 212 of the nut sleeve 20. Further, the flange 21 prevents the rod body holder 30 from contacting the screw 10 during the lifting operation, thereby preventing the rod body holder 30 and the screw 10 from being worn.

In this embodiment, as shown in fig. 4, 6 and 7, the flange 21 is provided with a first vent hole 213 penetrating through the first surface 211 and the second surface 212, the rod base 30 is provided with a second vent hole 32, and the first vent hole 213 is communicated with the outside through the second vent hole 32. Through setting up first venthole 213 and second venthole 32 to external atmosphere can be in the inside circulation of lift mast, avoids the body seat 30 when rising or descending, because compress first bolster 40 or second bolster 50 for the inside and outside atmospheric pressure difference of lift mast is too big, influences the lift process.

In the present embodiment, as shown in fig. 4, the side surface of the nut case 20 is clearance-fitted with the side wall of the cavity 31. The clearance fit mode is adopted, so that in the lifting process, the nut sleeve 20 and the rod body seat 30 can be better matched, when the nut sleeve 20 is lifted along the axial direction of the screw rod 10, the first buffer piece 40 or the second buffer piece 50 can more stably drive the rod body seat 30 to ascend or descend, and the shaking among the rod body seat 30, the first buffer piece 40 and the nut sleeve 20 is reduced. In addition, the clearance fit mode is adopted, so that the problem that the smooth ascending and descending process is influenced due to the fact that the friction force between the side surface of the nut sleeve 20 and the side wall of the cavity 31 is large in the ascending and descending process is avoided, and the nut sleeve 20 and the rod body seat 30 are easily abraded is avoided.

In the present embodiment, as shown in fig. 3, a plurality of nut sleeves 20 and a plurality of rod bases 30 are provided, the plurality of nut sleeves 20 are sequentially disposed on the screw 10, and the rod bases 30 and the nut sleeves 20 are disposed in a one-to-one correspondence. When the carrier ascends, the screw rod 10 is rotated, the nut sleeves 20 respectively ascend along the axial direction of the screw rod 10 and respectively compress the corresponding first buffer parts 40, and the first buffer parts 40 apply an upward force to the rod body seats 30 to drive the rod body seats 30 to ascend, so that the carrier is lifted to a specified position; when the carrier descends, the screw rod 10 is rotated reversely, the nut sleeves 20 descend along the axial direction of the screw rod 10 respectively, and compress the corresponding second buffer parts 50 respectively, the second buffer parts 50 provide downward force to the rod body seats 30, and the rod body seats 30 descend under the action of gravity and elasticity, so that the carrier descends to a specified position. Through setting up a plurality of shaft body seats 30 for lift mast lift range is bigger, and, when the lift mast goes up and down to a certain position, makes whole lift mast also more stable through the support of a plurality of shaft body seats 30.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.

Claims

1. A lifting mast, comprising:

a screw;

the nut sleeve is in threaded connection with the screw rod and is provided with a first surface and a second surface which are vertical to the axis of the screw rod, and the first surface is positioned above the second surface;

the rod body seat is sleeved on the screw rod and is provided with a cavity, and the nut sleeve is positioned in the cavity; and

the first buffer piece is positioned in the cavity and is abutted against the space between the inner wall of the cavity and the first surface.

2. A lifting mast according to claim 1, further comprising a second dampener within the cavity, the second dampener abutting between the inner wall of the cavity and the second surface.

3. A lifting mast according to claim 2, wherein the first and second bumpers are flat-plate opposing wave springs.

4. A lifting mast as claimed in claim 2 or 3, further comprising a circlip, wherein the inner wall of the cavity is provided with an annular groove, the circlip is clamped in the groove, and the second buffer member abuts against the inner wall of the cavity via the circlip.

5. A lifting mast according to claim 4, wherein the height of the recess in the axial direction of the screw is greater than the thickness of the circlip.

6. A lifting mast according to claim 1 or 2, wherein the nut sleeve has a radially extending flange having the first surface and the second surface.

7. A lifting mast according to claim 6, wherein the flange is provided with a first vent hole penetrating the first surface and the second surface, and the mast body seat is provided with a second vent hole through which the first vent hole communicates with the outside.

8. A lifting mast according to claim 6, wherein the side surface of the nut sleeve is clearance fit with the side wall of the cavity.

9. A lifting mast according to claim 1, wherein a plurality of nut sleeves are provided on each of the nut sleeves and the rod body base, the plurality of nut sleeves being sequentially provided on the threaded rod, and the rod body bases and the nut sleeves being provided in one-to-one correspondence.